If you have more than 1000 Bitcoins in your wallet:
1. get yourself a low cost netbook.
2. Install not bloated linux (like archlinux) or FreeBSD or OpenBSD (in order of growing paranoia).
Damn, I used NetBSD, time to reformat!
I was wondering though, how well would a cheap android tablet work? They seem even cheaper then netbooks these
days, but no idea yet how secure they are, nor even if you can run bitcoin on them.