I by cheap tools at places like Harbor Freight for the women's center where I do volunteer maintenance work, because my tools tend to disappear there.
For the house, I bought a 14.4 volt Black and Decker drill in 2002, and I've barely used the more expensive drills two tool sets I've bought since then because the B&D is so light and reliable. The first tool set was from Coleman, and it wasn't very good. The second set was a Craftsman C3 18-volt, and the saws in the set are excellent. The drill looks pretty good, but it's so much heavier than the B&D drill that's still working so well.
But yeah, I'd swear by battery powered tools. Some places on my 3-1/2 acre lot are a long, long way from an electrical outlet.

-Joe-