I'm looking at the recently-ish updated MPBs. I believe the 17" is a bit big (not to mention pricey), and I'm wondering about the performance differences between the 15" models. Most of the work I'm looking to do is basic enough, the typical student kind of thing: write, surf, listen, watch. I'm also heavily into photography, and plan to eventually pick up CS3. I'd also like to experiment a bit with composing music and such eventually. And maybe some games. Nothing really heavy, but just some basic stuff. My dilemma, being the relatively uninformed geek that I am, is this: How much will the 2.2 to 2.4 processor bump increase my performance? Also, what about the video card? Will the 256 vs the 512 make much of a difference? Also an option are the refurbs. At the moment, there's an older C2D 17" sitting there for $2199 that's also a bit tempting. The 2.33, I believe. Speaking of refurbs--How do the older 15" models compare? I've heard the processor improvements aren't all that great, but I'm not how much difference the ATI card makes compared to the NVIDIA. Then there's the option of buying now vs later. I don't really -need- it now, but it'd be nice. Buy it before the 16th, I can get one of the soon to be obsolete iPods. But if I hold till Oct, there's Leopard. Which should run fine on any machine I buy, but it saves me the hassle of upgrading later.. And if I wait till Oct, I've heard rumours of the MBPs being updated again in November, or January at MWSF. Which is only waiting another 1-3 months. Any help/opinions would be greatly appreciated.