Mambo! Use Mambo. It has so many features.. and your design can easily be skinned to it.

http://www.mamboserver.com/ - Get Mambo here

http://www.mamboawards.com/ - This site is amazing. Check out all the websites that are running on mambo, it's awesome.

http://www.mamboportal.com/ - And get add-ons and such for your mambo