Hi BobG,
I have a bottom of the line Denon integrated receiver that I purchased a few years ago for $Can400. This receiver has all the surround modes that you mentioned (and then some). It automatically detects the mode so you don't have to worry about it. The manual also does a very good job of explaining what all of the various surround modes mean.
Any integrated receiver that you purchase today will automatically detect the mode. As for how much user input is required, user input is really only required at the very beginning. The receivers come with at least one microphone which you place at your listening position. You enable the auto-calibration on the receiver and it automagically sets the levels and time delays for all the speakers. Depending on the model, it may also provide frequency equalization. The only other thing you need to configure is the bass management.
Don't lose any sleep over this. It's all quite simple really and if you have any questions, people on this board will help you out.
