Originally Posted by mogorf
If I were you I would save on the external amp and would channel my funds into a Denon or Onkyo with Audyssey MultEQ XT 32 (highest version). IMHO the power of these AVRs should be enough to drive your speakers in your 15 x 20 room (even if you like to listen at 0 dB reference level), while you would get the highest SQ (Sound Quality) available on the market today.
Just another tip. YMMV.
Here's my reasoning...The Polks he linked are not very efficient (89db).
The Denon 2313 is only rated 105 watts stereo. You're looking at approx 75-80 watts into 5channels. Less into 7...
The Denon 3313 is rated the same, but 125 watts. So you're really looking at 90 wpc or so into 5, less into 7...
The Onkyo 717 plays the same misleading game. They use a 6ohm load to fudge the numbers, at a 1khz rating no less (not full bandwidth)
The Yamaha 773 is only rated for 95 watts stereo. So you're looking at approx 70 watts into 5 channels.
These receivers are not going to drive 89db speakers to reference levels easily. Push too hard, clipping occurs and there goes a speaker.The OP said he was concerned with Sound Quality
Only the top tier receivers compete with separates when it comes to sound quality. The amplifier section of a mid/low end receiver cannot (and should not) compete with the sound quality a separate quality amp. Having 1 box for the processor, amplifier is convenient. It's also inexpensive to mass produce them. But when it comes to sound quality, receivers simply cannot compete (unless we're talking about the top tier products, which are, essentially separates in 1 box).
You can easily pickup a ATI 5 channel amp for $1k, that will output 150 clean watts of power to 5 channels simultaneously. If you're not on a strict budget, there's no reason not to.