I want to add to my amp recommendations.
First, I previously recommended the Crown XLS series. I still do. They can drive your Omega speakers perfectly without clipping. My choice is the XLS1500 though. The 2000 on up are unnecessary overkill as the 1500 itself will easily provide more power than an Omega speaker can use. Do not by the 1000 amp. It uses a different front end circuit, I'm told, that isn't quite as good as the circuit the 1500 and up uses.
I recently listened to a pair of Quicksilver mini monos and a pair of their V4 amps. Both were excellent with Omega, Horn Shoppe, and a large panel speaker with a Fostex 8" driver. I was impressed with build quality of both amp series. I'm going to offend the Decware users, but IMO the sound, fit, and finish of the Quicksilver amps are better. If you don't need much power the Se84 series by Decware are good, and their best offerings. I haven't listened to Decware's flagship amp.
The best sounding tube amps I've used are Transcendent Sound, but they are kits. You have to build them. The megabuck amps that the audio publications tout are not in their league. I tried a CJ and ARC amps, and neither impressed me as much.
Lastly, if you can find parts for them, consider the Amp Camp amps designed by Nelson Pass. About 5 Watts and excellent sound. Another cheap amp, and you have to build them.
All of these amps will make your Omegas sing.
Edit: I agree with Audiophile58. The Coincident amps are very good. Didn't get to hear them with Omegas, but I was impressed with them on a nice 3 way design. Definitely worth checking out. Do not use boutique fuses though, a safety issue.