I know this is kinda from the past, and i am bringing back an old topic but i decided i wanted to add my two cents to the topic.
I prefer anything Debian based only because its net-install, Highly customizable, has all the latest software that all others have, and its not to noobish. The only ones i consider noobish are Windows for sure... Mandrivia, and Suse so far.
The apt system has never had any problems since i have had it, The desktop enviroment is great. Th stable server is secure and stable. My server was running the testing version of debian untill it went stable just a week ago. Now the new testing (lenny) is on my desktop the latest stable (etch) is on my notebook and server.
Since i have been using debian i have had no stability issues and windows use to crash all the time. (I am really hard on my systems).
Just my opinion on the subject