Well, depends on that you want actually but try this link and check out one or more categories to see what fits you
http://www.linux.org/dist/list.html
Personally I would go for SUSE for development and Mandrake for the more common usage, however a general distribution of Ubuntu would do the trick if you do not have high demands for add on applications and software, though the Ubuntu software release seems more interesting now than a year ago so I guess I have to check it out again.
Hum... Redhat...
