I'd install CCC anyway just incase I needed it even if I'd never use it.
I think it's "alright" to just have it there since it's not like it's running in the background. I just disable the icon in the system tray and install ATI Tray Tools. If I need to get into CCC I still can.
Have fun with that X1900XTX
I've heard HDR+AA is da bomb, but I wouldn't know anything about that
