I actually purchased two Monster Power boxes for my studio that have 8 outlets each. I really should have done this a couple of years ago. I just was never sure how much of a difference it would make. Well, I have to tell you when playing back music in my studio, I hear a little more depth to my monitors that really made me quite happy. Of course it's just not the computer, and the monitors going through this power conditioner, but also my pre's, channel strips, Presonus Central Station, Mackie Controllers, etc.
I highly recommend trying out a power conditioner for your studio. You don't have to pay over $1,000 for the high end one's to make a difference. I spent about $500 in my studio and the difference is quite nice. Not to mention, it protects your gear against spikes and helps even things out with the current. I am sure the higher end one's will be a little better, but the Monster did improve things in my studio...for the better. The depth of my Focal Twins have improved about 7-10%.
I'm really appreciative that it's not like that here.