I have a Nakamichi AV-8 reciever with JBL Northridge speakers. I'm pleased with the sound. Two channel sounds great, the fronts are the dual 10" model and they really sound nice on the Nakamichi. They seem to be a great match in my opinion anyway. Movies sound good too, but I cant really say too much good or bad. Surround sound is kind of new to me, this is my first 5.1 reciever so cant really compare it to much else. Anyway, there are a few things I dont really like about the Nakamichi. I really dont like the remote, just really an old ugly design. It occaisonally stops working too and needs a tap. An even bigger problem with the remote is the volume adjustment when using the tuner. Its impossible to set low level volume. It can be just a little too loud and 1 click of the remote will turn it down way to low. The increments are way to big. Couple other minor things I'd like to see different too. I was thinking of changing to a Harman Kardon AVR 630. Will this be compareable in power to the AV 8 I have now? The specs are close to the same but I'm guessing both will outperform their specs. I also really like the sound of the Nakamichi, is the H/K going to be a step backwards? I guess the rest of the features the H/K will blow it away but I'm really concerned about sound quality and power. Should I keep what I have or buy the H/K?