yep, go for the 6200! unlock those pipelines and overclock it, and you have a card "almost" as good as a 6600gt, but better then a 6600 vanilla.
plus, the 6200 (the whole 6xxx series does) has shader model 3.0, while as ALL ati cards have 2.0 now, but i read that if you want to play games that come out late 2005/2006 (unreal 3 engine games, elder scrolls 4: oblivion) that you NEED shader model 3.0
dont settle for 9800 or 9600 or 5500, go the 6200 route! you won't be dissapointed! and you'll need it for future games