I recently purchased the HK 7200 from One Call. The 7300 replaced it, so you can get a pretty good deal on it. I haven't done a comparison of it to the 630, so I don't really know the pro's / con's of each. The 7200 is a friggin power house though. It's a monster at 53 pounds. I think I paid around $900 shipped, new in the box with warrantee. Shipping was $150 (FedX to Alaska). You can most likely still find one on the internet somewhere, new in the box. I didn't see it available at One Call anymore, bummer. For your reference, the 7300 is going for $2200 and the 7200 was going for $1800 when it first came out.
One annoying feature that both these share is no Bass/Treble control over the second zone. All you get is straight stereo. If other multi zone receivers have more control of the second zone, I'd seriously look at them.
