I think rmaf just hinted at what Omegas are capable of, neither one of the rooms was very well set up, largely because it wasn't set up for only the Omegas, and the stands for the 6" monitors were lost in shipping.
Anyway, I really liked the 6" monitors, but I think the 4.5" alnico drivers will be worth waiting for... depending on what kind of sound you like of course.
The sticks with the 2a3s sounded like they needed more break in and the subs didn't integrate as well as they could. They showed some good imaging at times, and gave a clue as to what they are all about. I'm not trying to be harsh, but I have a set of 4.5" XRS that I've spent a lot of time getting dialed in to where I'm really happy with how they sound, so I know how much better they can be.
If I had any advice, it would be to go to the show with a setup that's already dialed in for the environment you'll be in. No compromising by sharing rooms with other speaker manufacturers either. This is what Merlin has done, it's been the same system for the last 3 years, and they are consistently good, and their show sound is actually representative of what the equipment is capable of.