http://www.xgameservers.com THEY KICK ASS, WORD. Our clan Men of Brutality uses them and they rock, and now they got a lot more locations around the USA so check em out!
Red soccer devil and Bazooka joes chat filter
Some type of realism ( if you like that type of game play )
dog tag map fixes
autokick to monitor your server
ton of custom maps
And one of the most important thing of all
LABEL YOUR SERVER SO EVERYONE KNOWS WHAT TO EXPECT WHEN YOU JOIN.