I have a Wisdom SCS sub that I use for 2 channel audio only. The experts all tell me that this is a top contender in the subwoofer for 2 channel audio, and my experience with this particular sub in my system is great. It is also quite thin, and can be possibly hidden behind something in your room, so that can be a plus as well. The price is about right as well, compared to your list above, so I would at a minimum add the Wisdom SCS sub to your short list, and do a little research. Good Luck!
