I have an itsy bitsy 75 watt inverters (2 for $30 from Sam's Club) that worked perfectly fine for both my DVD & VCR players. For power tools, imho you're better off with a cordless set, and plug just the battery charger to the inverter. I just bought a Ryobi cordless tools set ($249 at Home Depot) that comes with 2 batteries, drill, circ saw, saber saw, scroll saw, vacuum, torch, and a baby CHAINSAW!!
WOOHOO!! NO MORE BRANCH HICKIES!!! 