Advice for big sound in small room

I agree with the above posts. I would add that you might consider some acoustic treatment for the wall behind you. The short distance from the rear-wall reflections to your ears will sort smear the sound, screwing with your soundstage and imaging...whatever that means.

At your price point, check out the Plinius 8150 integrated. Your system deserves good electronics. The Plinius is one of the best integrateds that I've EVER heard.

Sound treatment. I have a room of similar dimensions with "monitor" speakers. To get the best sound, suggest you try the speakers along the long wall spaced as wide as possible (8 ft or so). This will put them rather close to the side walls, but if you treat the first reflection point and toe them in towards your listening position, you will get v. nice sound. For more info, check the AudioPhysics Website or the FAQ at AudioAsylum.com. As far as associated electornics, ProAc's are v. nice, so feed them good stuff! May also want to look into a powered sub. No need to go crazy, a small REL (Strata/Storm) will do wonders, as will a small Velodyne or the Sunfire sub.