Best all in one email and social networking client?

hey so i've been looking around at some of these programs that put all of your social networks and emails in one place. I've tried digsby, but i didn't like it very much. what is the best service (either online or installed on a windows computer) that will let me send and recieve emails from multiple accounts, get my facebook stream, chat on facebook, and send/recieve facebook messages, get twitter stream (optional). I just want one place for everything, so i don't have to switch windows as often.