My opinion about server4sale.com : I'm very satisfied. My server is very fast, the support is very nice, qualified, obliging and available... only 1 minute with MSN Messenger and 5 minutes by mail ou ticket. Nothing to reproach.
The MSN support is really great compared to other hosters where such support doesn't even exists. I was told by my old hoster to contact them by mail or by ticket when I tried to reach them by MSN...
Server4sale migrated all my customers account from my old server and they secured it for me. It's the best support I've ever had (when compared to server-matrix or beachcomber where I still have some servers).