Wife opened door to build my best ever system...ideas for what it should be?

If you are keeping your speakers and this is all going to amplification: McIntosh 462 with matching tube or solid state preamp; or Luxman M900, Son of Ampzilla, Plinius Reference 150, or Belles Power Modules Virtuoso--any with matching preamp; or Gryphon 300 Integrated Amplifier. Coda 8 stereo amplifier and Boulder 866 Integrated Amplifiers have gotten good press recently.

God I love Hawaii!  I went there on my first honeymoon and a second vacation with my first wife and I still love the state.  Given it was with the first wife, that is saying a lot!

If it was me and you are thinking about consolidating down to one system, why not upgrade both?  Your room is about the size of most demo rooms at hotel shows like AXPONA and Capital Audiofest so if you can deliver great sound in a show, 

In a room that size you have a choice between a smallish floorstander or a great standmount with maybe a smallish subwoofer.  Given your current system, it sounds like you prefer a slightly forward sound profile.  

Given your taste and budget, there are a million options so getting things narrowed to what you like based on sound, looks and your concerns around energy consumption and additionally, how many pieces do you want?  Separates or an integrated?  

Really think through what you want and then it will be easier to map out a plan on how to get to it?  Especially in terms of sound.  

A few things I would look at through:

Linear Tube Audio - David Berning's ZOTL circuit is amazing and you in essence get a cool running tube amplifier.  These are brilliant, albeit lower power.  

Bob Carver equipment - This is also cool running tube gear.  Bob Carver found a circuit that used to be used in CRTs that he applied here.  These are much higher power.  

Rogue Audio -  Check out the Hydra and DragoN power amps.  These are Class D with a tube input stage.  I own a Hydra and it is a spectacular amp.  Also look at their RPX line of preamps.  An RP5 is wonderful with the Hydra and would also work well with a Bob Carver or LTA amp.  

Other class Ds, Gs and Hs - Wyred4Sound, NuPrime, Benchmark, Krell, etc....  There are a million of these products on the market these days and most are very good.  They will all run at similar temp or cooler than your current Class A/B gear.  A/B gear is wonderful and there are lots of choice.  

I would avoid Class A if heat is a concern.  75% of the energy that goes through a Class A amp burns off as heat so...

For speakers, there are 100s of brands and even more sub-brands that are on your budget and are amazing.  To narrow this, key is sound profile and looks.  I would take a look at B&W, Spendor, Focal, Revel, Scansonic/Raidho, Harbeth, Kef, Vandersteen, Wharfedale, Elac, Tekton, Zu, Magnepan, Martin Logan and Paradigm and let us know what you like and don't like aesthetically,  Once we know what you like in terms of looks and sound, it becomes easier to help zero in on products that are worth listening too. 

That is where I would start and reporting back on your thoughts can help narrow things.  

Full disclosure, I am a dealer and manufacturer of speakers that sells some of the brands listed above. 

I would start with the Swarm subwoofer system.

This will take care of the bass issues so you get proper bass at the listening position in almost any room, from about 75Hz and down to 20Hz.

This frees up the main speakers to not have to go down so deep, and that dramatically widens your choices. For example if you want to go tubes but are worried about heat, you can get a more efficient main speaker that does not require a lot of power and so your tube amps can be smaller. The beauty of this approach is it scales nicely in most rooms! If you decide you want some sort of planar speaker it will still work great; and no need to lose resolution or bandwidth relative to the most expensive speakers made; you won't have to take a back seat to any of those issues.

A Hilo Haudiophile sez HI.  I got to say, too, that I worry more about my tranny gear going belly up in the heat than I do my tubed gear.  The way I figure it, the designer of the tube stuff probably made doubly sure the device can take the heat.  Needless to say, my grass shack doesn't have A/C.  Cooling is the responsibility of the trade winds and a ceiling fan.

atmasphere:" I would start with the Swarm subwoofer system."

+1 For all the reasons he listed.

     A complete Audio Kinesis Swarm or Debra 4-sub distributed bass array (DBA) system is a bargain at only about $3,000 and will provide near sota bass performance throughout your entire room. Getting the bass sounding and feeling right is typically the most difficult thing to do with any audio system.
     A DBA will provide a powerful, dynamic, solid, smooth, fast and very realistic bass foundation to all your music. I believe powerful, dynamic, visceral, palpable and natural bass reproduction is the biggest single distinguishing characteristic between an audio system that sounds and feels like a hi-fi system playing prerecorded music and a system that sounds and feels like you’re listening to music played live in your living room or have been transported to the recording’s musical venue and are listening live to the performance.
     The distinction will be very obvious with a properly setup and configured DBA, the bass will integrate seamlessly with your main speakers no matter which brand, size or type of main speakers you utilize and music listening sessions will be transformed into visceral, palpable and very high quality musical experiences that are extremely enjoyable.
     I realize my description of the DBA concept likely sounds like hyperbole and too good to be true to you. However, I’m fairly certain that even a brief home audition would convince you of the concept’s extraordinary effectiveness.
     I’m not associated with Audio Kinesis in any way, other than being an owner and user of the AK Debra 4-sub DBA complete kit system for the past 5+ years, and a big fan. I think you’ll almost certainly become a big fan, too, if you decide to audition one in your room.

Best of wishes,
Tim