But the 663 only has two optical inputs, which I think is pretty dumb. Doesn't the 661 have three opticals?
If your main source are optical, I think there are receivers with more than either of these. I admit I hadn't considered the extra optical in my "performance advantages" statement.
have three, actually, if you count the one on the front. The 661 has four total.
Do both receivers have the same number of HDMI inputs?
Yes...HDMI would be the main reason to upgrade to either.
Also, I think the 661 can be found for $50 cheaper than what people are getting the 663. Although $50 isn't that big of a deal.
Can anyone tell me exactly when the V663 is going to start shipping?
I'm following the axiom of "blow most of your money on speakers" and springing for a SVS Sound SBS-01 7.1 setup.
I picked up my 661 for $400.00 new so I think I got a pretty good deal. The dealer I purchased the 661 from told me to expect to pay around $150.00 more for the 663.
You should both check out this thread:http://www.avsforum.com/avs-vb/showthread.php?t=995796