Transparent Reference XL question

The Ultra Xl was known as the most for less $, and you might or might not like the combo. It will change the signature but the Super already has a much different sound than Ultra or Ref in your system. I would try to match the line you choose for your taste, like I chose Super XL for a Krell 300r,250cd/2 and B&W CDM7NT's. I love the rock and roll, and musical presentation with the $ considered. I had Ultra Xl on my main N802 but I still opted for something different because it was to tame for me. Happy listening :-)

Upgrade the speaker cable first to Reference with XL, it is amazing!
If you haven't addressed power filtering with a PS Audio, or Hydra then you need to address this first.

Sorry, no easy answers. You will hear a difference but it may or may not be better. I once had a system with Ultra and when I tried the reference I didn't like it as much. Better resolution but the bottom got thinner. I agree that the Ultra is your best bang for the buck.