Mac book pro - Will it satisfy my needs?

Hi all,

So, I bought the mac book pro 13" (2,4 GHz, GeForce 320M), but hasn't opened the box just yet. My concern and question is how well it will perform (this is my first mac by the way ;D) when working with external monitor and a little bit heavier programs.
For example, how well is it likely that it will perform when working in photoshop cs5 on extended monitor with a couple of other programs running in the background??
Will it be too much for it ? (i saw that it only uses the RAM-memory for graphics and don't actually have any dedicated graphic memory at all - which would be the absolute worst case scenario if it was a pc, though now its not - thank god)
..Or will it stand it just fine ?!

thankful for answers!

gnorf

I use my MB specs on the side <------

To do my school work. Which is pretty much movie poster, and web design. If you can cram in 8 gigs I'm pretty sure it would run flawlessly.

I have the older model. If you not using heavy work. It will be fine. My Aperture and CS5 works just fine on 2G RAM