The 2100 looks like a great amp and glad to hear your enjoying it. Has power meters too!
Marantz, like Yamaha also has two lines of components. Their mass market HT stuff and quality 2 channel components still being built in Japan. I have been happy to see that Yamaha is going down this same road. I only hope that perception of the last couple of decades of being in the cheap black hole, has not jaded audiophiles.
Technics is coming back with more esoteric offerings also. I wish them luck!