amryf83,
It should be sufficient, unless you're planning to do them simultaneously; perhaps the 1st and 2nd is ok to do simultaneously but it's gonna be difficult to be editing your photos and working with CS whilst gaming, right?

kwekeugene,
It'll be great if they could do something about the weight - though for a 15.4" Widescreen, the MBP is considered pretty light-weight already but still.... I do feel the burden *grins*

amryf83,
A separate/external (whatever the term is) graphic card will always give you better quality when compared to an onboard one. Plus, it doesn't utilise your existing RAM, giving you additional RAM to work on