You can have the best of both worlds. For about the cost of a UFO2 with XLRs you can get 2 UFOs (and custom XLR to RCA interconnects) and maintain your true balanced signal all the way to the speaker terminals while avoiding the nasty XLRs. Check out page 17 of the UFO manual for the details:
https://www.decware.com/newsite/SE84UFO-MANUAL.pdfNote that the UFO and UFO2 are essentially the same amp under the hood, they are just missing the wood base and meters, so you can do it with a pair of UFO2s (or even 25th Anniversary Editions) if you choose.