If you want the best speakers, you'll want the Audioengine A2. It has decent bass from the speakers anyway. You can always add a sub later. These will hold their value. Meanwhile, if you buy the others, they will be worth significantly less when it's time to sell and are inferior speaker wise.
EDIT: I was just reading your Most Commonly Recommended Audio Products forum and it's very informative... thanks!
Edited by Slahtr - 10/13/11 at 8:29pm