No, you don't have to have the controller connected in the H70X. It doesn't reset the volume when switched on/off, it remembers the last setting.
Right, but as was stated earlier, this is the same story for the h700/701. However, the only benefit is you get auto t/a. So, I think it depends on what you do/don't get with the controller that will determine if someone wants to buy it, too, or not.keep in mind according to alpine, you will need the rux controller for full functionality regardless of deck with the H800 processor