Recently picked up a used Sola MCR portable (1000W) for $20. Not bad considering they're $1500 new. My 42" plasma is just under 600W draw. Too noisy to be in the same room but had an easy solution for that. Really did improve the picture. Includes isolation, filtration, regulation and surge protection. Industry and professionally proven. Another on Ebay for a few days, maybe. If you can hardwire off the panel, all the better, but would require 3000W if other outlets on circuit included.