I was just where you're at a month ago. I ended up going with the Harman Kardon 630 from One Call ($718 shipped to my door). I saw it the week before at Circuit City for $1299! They, by far, had the best price on the internet and for a factory authorized reseller (meaning your warranty is good). I've had it for a short time but can tell you that is pleanty a powerhouse. SO...just one more to think about. Oh...and it's pretty sweet looking too.
www.harmankardon.com
Though whatever you pick I'm sure you'll be very happy.
Enjoy!