I'm reading the 7001/8001 manual right now. I'm very impressed with these suckers on print. The 8001 has a different type of, and pretty robust amp, plus two asignable HMDI outputs. Other than that, it is the same as the 7001. I know absolutely nothing more than that about them though. This is the first time I've ever considered Marantz and I don't really know why. I'm not sure, but I "think" they are under the same parent company as Denon.