Stands make a huge difference with ProAc

As far as I know, Target is went out of business, but they may have reorganized. I think that stands would make a big difference. My recommendation is the call the guys at Sound Anchors. They really know what they are talking about when it comes to speaker stands and will custom build one specifically for your needs.

Yes, stands are very, very, important in getting the most out of a monitor. I don't think you are going to more bass though. You should get tighter bass with a solid stand and it may seeem like more since it will easier to follow a bass line if it is less muddy.

Bass response is also heavily dependent on placement, both the speakers and your listening position. Try moving your chair and/or the speakers, closer to a wall will usually get you some more bass.

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.

Proac are stand critical. Get the best that you can. It is the difference between loving and hating your speakers.

You can probably produce a fuller (and slightly warmer) tonal balance with either Cardas Golden Cross (Cardas Cross may also work) interconnects and / or speaker wire. Acoustic Zen Matrix Reference or Wow may also produce a similar effect.

You can also transform the sound of these speakers by using one, or ideally two, Vandersteen 2Wq subwoofers, which will seamlessly crossover at 80 hz.

I agree that the right speaker stands are critical to extracting the most from these speakers, but I think adjusting your system's tonal balance will produce your desired effect.