I would think the Cambridge or the Rotel could be viable options baring they are putting out enough power for a room of that size. I would also check the used market and see what can be had in a preamp/amp seperates setup. You could probably find something with like sound quality and possibly more power so that you won't have to work the unit so hard to fill that room of yours which is pretty big. I have seen two channel preamps from great companies go for cheap used and power amps the same. I would give Audiogon a try and see what you can find there. If you are pretty avid on new equipment the options listed above are good ones or you might give Emotiva a look at since you could get a preamp and power amp in your price range and they would be new with a 30 day money back guarantee if you don't like the way they sound.