Starting Over and I need your help

I'm not familiar with your components except for the Node 2i. The sound of the Node can be improved with an aftermarket power supply kit. There are several choices available. I bought the LHY kit from Beatechnik which is in Singapore. I would recommend the bundle kit with the LHY outboard dc voltage supply (I got the 25 VA option). All of their pricing is in US dollars. There are You Tube videos about the kit done by one of the main guys at Beatechnik.

Some amount of manual dexterity is needed to do the install but, it is rather simple to do. You will no longer use the C7 (figure 8) power cord but instead, will need to use a conventional audio power cord with the standard C15 IEC cord end which will greatly expand the choices of power cord to use in this case. PM me if you are interested in what I found to work very well with the LHY/Node setup. 

Your Omega 7 speakers are speakers you can build around.  I maintain that they are the sleepers of the Omega line and I actually prefer them to the Alnico models.

I would be surprised if your amp were not the piece letting you down.  Even though the Omegas are higher efficiency and do not require tons of power, I just don't get that the amp is doing the Omegas justice.

When I had the Omega 7's, I was using a Prima Luna integrated with them.  Over the years, I have moved equipment around and am now using a Heaven 11 Billie hybrid amp to drive Zu Audio Omen monitors.  Similar enough, but not quite the same as your set-up.  It comes with its own DAC and phono input, so a good number of options.  

Lots of reviews out there, including YouTube.  

Rich 

Is your budget 3000.00 total or 3K + whatever you can sell your current components for ?

@rar1 makes a good point. The Omega speakers are pretty good and probably don’t need replacing right away. As others have pointed out, your amp seems to be the weak link. I’d start there with the thought of adding an outboard DAC to the Node. Those two things should enhance your enjoyment significantly.

If you go with an integrated or all-in-1 you don’t have to worry about messing around with components. THe performance and feature sets of integrated amps is excellent these days. I replaced $10K of separates (Audio Research  and Bel Canto) with a $3000 all-in-one (Cambridge Evo 150 which uses very highly regarded Hypex amplification) a year or two back and have been most pleased.

I'd keep the omegas for now maybe adding a sub or two to flush out the bottom end and sound stage. I've had a set and they can do some great things.  

your amp is definitely the limiting factor here. If I was you I'd have a look at Schiit Audio for new tube Preamp and SS amp easily in your budget. I'd suggest a freya + and AEGIR 2, would be a nice improvement and well under your budget. 

Another option would be the rogue audio Cronus Magnum III tube integrated, you can find these new in your budget and use well below.

Cronus Magnum III (rogueaudio.com)

Schiit Audio: Audio Products Designed and Built in Texas and California 

many other option so do some searching on here and US/Canuck Audiomart.