I don't know what OS you're gonna be using and what kinda games you'd be running on it but I have a feeling you'd get generally better DX10 support with the 9600GT as well. *shrugs*
EDIT: Quickly while I think on - I reckon the following will be a priceless addition to the rig - http://www.microdirect.co.uk/(11731)XPRO-Black-17-in-1-Internal-Card-Reader-USB-20.aspx
I have an internal floppy / memory card reader in my system and it's amazing how convenient they prove themselves to be, I'd recommend one to anybody, I don't think the make is too much of a concern, I randomly spotted that and it seems even more flexible than what I have, and I paid £17 for what I have at the time!








