I have to disagree on some of the thoughts on power conditioning. If you know you have noisy power from the source or have items like flourecent lights, dimmer switches, or some other types of devices on the same circuit, power conditioning can certainly make an audible/visible difference. This is an area that is well understood (use of capacitors and inductors to filter out high frequency noise and any DC voltage much like in a speaker crossover) and easily measured/demonstrated.
Of course, if you don't have such problems, you probably won't notice any difference and none of us can say if you will.
If you want to save a bit of money on that item, a few places have had the Monster 3500MkII on closeout for a while. Onecall has it for $170 -
http://www.onecall.com/ProductDetail...id=97&id=29477