I have a pair of B&W 805's and have had them for about a year and a half. I ran them with a Denon 4802. This receiver has more then enough power and it made the 805's sing. With the proper cables and source gear I had no problems. Until I replaced the Denon with the Anthem AVM30 pre-pro. The difference was jaw dropping. The B&W's came alive like you would not believe. Detail, and I mean the background riffs that weren't there before. Quiet vocal passages that make you back the cd up to see if what you heard is what you heard. As good as that big Denon is, the Anthem kicked it's ass. There is something to separates. If you can, check out a good preamp. If you like music like I do,don't ask yourself what does it cost. Ask yourself what's it's worth. To me, 365 days of pleasure.