You are absolutely right, it will come down to personal preference - thats what this whole hobby is about, and why there are so many options available. Also, what volume levels, what music, near, medium, or far field, room acoustics and size, etc., etc. Personally, I have never heard a better amp on Omega speakers than a flea powered single tube per output SET or SEP tube amp. I was converted to Omega on a very good solid state amp (Audio Zone Amp STi), but when I switched to the Decware in the same system, I never could wrap my head around solid state after that. Omega is an incredible speaker in their own right, and so is the Decware SE84 amp, but put the two together and the whole is greater than the sum of the parts. Sadly the the 6N15N-EB tube that Steve ships with his SE84, and the EL84 tube are mostly considered beneath the larger more expensive tubes, which in my opinion is a sad oversight. When matched with the right speakers (particularly the latest Omegas) those tubes are hard to beat for my ears.
Concerning the Decware having enough power for the Omegas: Several years ago when I had my SE84C+ with HempCone Super 5XRS, Super 5 Monitors and Super 3i Monitors I felt the amp had barely enough power to run them without a sub (unless on the desktop for the Super 3i), but with a DeepHemp sub it was terrific. With the new RS5 Super 3XRS my latest Decware Select never goes beyond 12 o'clock, everything is so much more effortless all around with plenty of volume. I listen in a large room with my ears about 8 feet from the speakers.