Will a Power Conditioner Help?

I am setting up a new home theatre system and need some advice. When I was remodeling my apartment I ran a heavy power line under the hardwood and put an outlet in the floor (don't ask - my TV works as a room divider), and have been using this outlet for: TV, DVD player, computer, and the A/V receiver. This may seem like a lot, but now I think I may be having a real problem - I decided to go to separates, so will have a pre/pro and a 200W*7 amp instead of the receiver. Something makes me think that one power outlet to run all these devices is not enough. Will a power conditioner help? Thanks!