If you're running 1 sub, off the top of my head i would say go for the 1 channel. Since the type R's are dual voice coil (I assume 4 ohms per coil) get yourself a good Class D Monoblock amp that is 2 ohm stable. Wire the voice coils in parallel to create a 2 ohm load on the amp. So for your question about the amp, i'd go with the zx1000.1 of those two, although what i just described is what you should look for with any amp. Remember, research is your friend.