OSIRIS stands can be found for $250-$300, I have a set I use under my Vmps 626's. These are very well made and heavy stands (50lb. each unfilled) with good spikes that adjust up or down about 2 inches. Like Herman said, good stands will give you nice tight bass, to get more or less bass out of your speakers you will need to play with placement in your room or maybe even try changing walls. There have been lots of threads about speaker placement, you may want to do a search here on audiogon.
Stands make a huge difference with ProAc
I just purchased a pair of second hand Response 2, I'm very happy with the vocals etc, but a speaker of this size should produce more BASS. I'm using some decent quality wood stands for now. Would some heavy duty Target R2 stands make a huge difference. I'm also using SS with a passive pre, I may have to invest in a tube amp. They just don't sound like they did at the dealer some time ago. I guess you can't have your cake and eat it too. I don't want to give up on them yet though because I've read some very good reviews.