depends whether you want to play ring/cash games or tournaments (MTT's or SnG's)

If it's the former, I don't really know sorry, because I play mostly SnGs.

If it's the latter, you could do have a read through DavSimon's SnG guide, the last post of which has a good review of a lot of online sites

http://www.flopturnriver.com/phpBB2/...pic.php?t=8202