The AVR-525 is the receiver to get. H/K makes some great sounding gear. The replacement for the AVR-525 will hit the shelves in a month or so. H/K has given the receiver a face lift -- and features silver on the bottom half - along with a blue glow around the volume knob. Sure, the new AVR-630 will add a few more watts of power and give you the option of upgrading the firmware (yeah, we've heard that before from other manufacturers) - however, the AVR-630 has a list price of $1,199. At 1/2 the cost, the AVR-525 is the bargain to buy now - while their are plenty available.
I owne the AVR-7200 and kind of wish that I settled on the AVR-525. The 7200 is the "big" brother to the 525 and provides way, way power than I'll ever use.