I'll tell you this
any mousepad >>> no mousepad at all
as far as which mousepad will be best for you, depends on how you hold your mouse, how sweaty your palms get and how often you're willing to give your mousepad a wash.
personally I've been using the cheapest mousepad I can get from staples for like $4-5 and they've been doing wonderfully. I've tried some expensive mat one of my friends had, couldn't tell the difference between mine and his. Afterall, it's just a mat...