I've decided to go with the Mirage Omnisat speaker set up. Probably with a Hsu subwoofer.
It's in a basement (in Michigan) with 8 foot acoustic tile ceiling. The room is about 25 x 35 overall. I'll 'divide' the room in half with couches, etc.
What receiver do you recommend for this setup?
I've looked at: Harman Kardon AVR 330 Denon 2803 Onkyo 701 Integra - not sure of the part number) Panasonic xr45
Those Omnisats are what aI call a very "hot" speaker--that is, they are very detailed and even bordering on bright, but they are wonderful to listen to with the right electronics. I think they are a very good choice.
I would defintely get the H/K from your list. It is the warmest sounding and has the best power supply (H/Ks always put in quality power supplies, unlike most receiver makers). It also has a slightly laid back sound that will take the edge off of those OmniSats, without sacrificing their wonderful detail. I have heard this combo and it really works well.