Help please upgrading my old Pre/Pro..

ah I missed that, sorry Sir! You are lucky, as Krell is a fine choice. Wish I could afford one but just not in my budget right now

I think you are looking over a very affordable option by not considering the Marantz 7702 Mk II .....

You don't need more than that.

If if you love love love it, sure, one day splurge for an 8802a or 8803 when they show up.

Love mine with Oppo 105, Brystons all around, B&W 802M LCR etc.......

Sounds indistinguishable from 8801 I had as I look to move to ATMOS one day. 

I'm on my 3rd Marantz SSP and have been happier w/each one in both sound quality & function.
Sound quality
AV7005 New- big improvement over my first SSP - used Rotel RSP1098 
AV7701 Refurbished - marginal improvement over 7005
AV7702 Refurbished - slight improvement over 7701
Media compatability & function for music drove most of the upgrading since the 1st Marantz purchase. This ended up being a bigger factor than anticipated for me so be really careful to insure you get what suits your needs & future growth expectations. Having extra components to cover scenarios your SSP can't becomes burdensome and annoying if that's what you're expecting from it. My music collection is too large & complex to tolerate converting from what I've settled on. I want to spend my time listening not converting and correcting meta data. I was getting really tired of keeping a portion of my music in 2 formats so I could get the best quality on mobile and in-car.

The Marantz media playback only gained in track FWD & REV & gapless playback with the AV7702 I believe.  Yes, welcome to 1986 technology. Video wasn't a priority for me until recently with an OLED 4K TV & subsequent acquiesce to a new 4k blu-ray player. Unfortunately I'm stuck without HDCP 2.2 compatibility, but I've found a work around that avoids another upgrade for now.  Streaming 4k video is really compressing and loosing much of the advantage while paying more. Even regular HD streaming they strip the original high quality audio down to a regular res 5.1. That's fine in many situations, but a complete non-starter for me in a premium HT experience.

As for streaming content from the internet, I thought that would be a bigger deal to me, but I'm using it less and less really. It's good for trying new stuff, but the quality is so comprimised the value isn't there to me. The Marantz will play a crappy MP3 as well as or better than most. I recently tried Tidal w/MQA. I have hope for MQA's adoption and growth, but it's going to take awhile.  Tidal itself was ok, not great. & keeping the MQA quality flowing consistently was tricky. You can direct stream MQA high res to the Marantz thankfully. Keeping the settings aligned between software, computer, and Marantz got annoying quickly.  

I have yet to find a configuration where streaming over wifi delivers the full quality expected, even if it's a local stream.  It's acceptable in some situations, but for me it's not when listening critically. 

If high res audio is important be careful how you use processing features like tone adjustments & Audessy. I think Audessy does a terrible job of room correction. It's gotten marginally better in each unit I have, but I try to avoid it when possible. Most processing up converts or down converts digital signal depending on source.  The Marantz has a custom EQ that you can set up, but I don't really use the future.  A few well placed acoustic treatments might do wonders vs trying to compensate with the EQ.  For me, I want the best digital conversion possible with excellent digital & analog filters and as little interference as possible to the preamp and ultimately the amp.

My view is SSPs have short shelf lives and loose their value quickly. Formats and codecs probably won't ever settle down.  The alternative is separating functions out of the SSP but then you add layers, compromise quality sometimes, and often add complexity. & that's still no guarantee.  All of my SSPs have been used/refurbed except for the first Marantz. They will loose their value no matter what.  So factor real life cycle into your decision.  From my research, most high end SSPs are far behind from a tech perspective, there simply aren't the resources/business case to keep pace.  Emotiva seems like an interesting alternative, but they seem to be slow delivering upgrades & they still cost $$.  I'm tempted to try them when I'm ready to upgrade again.

Thanks for the awesome feedback and opinions/suggestions guys!! This forum is awesome..

I didn't overlook the 7002MKII, mainly because I can get a screaming deal on a "new" 7703.

Ultimately for my budget and what I'm looking for right now I think the 7703 is the best choice. Like you said if it's great and I totally LOVE it, I can always upgrade to the 8802, 8804 etc.  down the road ooooorrrrrrrr I can just hold onto the 7703 for a long time like I did my Acurus ACT-3.

Ordering the 7703 today. Will post back when I get it hooked up and adjusted.