Thanks, Nomo . . . I'll check out the V663 . . . regarding your suggestion of speakers, which would you recommend? . . . the theater room is in the basement, about 12'x17', with carpeting and 8' drop-ceiling . . . I would think that the upgrade would be the AVR first and speakers second? . . . what are your thoughts? . . .
There is going to be NO RECEIVER on earth that will sound any different from what you've got as long as your using those, those, I can't bring myself to call them speakers, kenwood things as sound radiators.
Most on this board will tell you to go out and listen to ALL the speakers you can, but not from Best Buy, or other chain brick & mortar stores, but from audio shops.
Problem with these audio shops is sticker price. Dealer price. Scary prices. Great speakers, but you gonna pay. This leaves us with online dealers, and many are damn good.
Since I don't know your budget, I'll just give you some links, you can audition them in home for 30 days and return them if you don't like them. Here are a few.
AV123 - Speakers and Subs. Excellent!
Axiom Audio - Speakers and Subs.
Aperion Audio - Speakers and Subs
I love my Aperion Audio 5.1 setup. Skip their subs, go with
Hsu Research or
SVS instead.
SVS is starting to build speakers now, once known just for wicked subwooofers. Give their site a good look.
Emotiva is also making some awarded bookshelf speakers, and the company is gearing up for some serious electronics to follow.
But before I mutter on, how much you wanna spend? This website is like a black hole for your wallet, you will buy and you'll love it
For speaker wires, HDMI cables and other interconnects please do yourself a favor and buy from
Blue Jeans Cables. They have a cult following here

Excellent cables, great prices, custom lenghts, FAST SERVICE.