Welcome Tweedy, Just my 2 cent worth. I've got a larger room (about 2400+ cu ft). I went with the VP 150 and I'm really pleased with it-my room layout is challenging for home theater but the 150 performs well and best of all I don't have even a twinge of "upgrade-itis". I'm powering M22's, VP150, QS4's and a Dayton 10" sub with the HK 630. You can find great deals on HK's Ebay site on the 630 if you want to go the refurbished route. As previously noted there are also good deals to be had on the 635. Either one will serve you well-main difference is the addition of the Room EQ feature on the 635.

M22's, VP150, QS4's, HK 630, HSU VTF3-MKII