I bought the Def Tech AW6500 for speakers and found they put out great bass when positioned correctly. They run about 400 for a pair on ebay new.
I found the base to be adequate, but after seeing that sub you posted I too would be curious as to how it sounds in the outdoors. If anyone has any experience with that sub please reply
Harman Kardon 3700
Klipsch Rb-51 II's
Klipsch Rc-52 II
Love me some Dave Matthews Band, Dave and Tim, David Gray, or Ray Lamontagne