I want to replace my desktop with a 15" SR Macbook Pro but I'm unsure if the 128mb 8600M GT will be enough to simultaneously power my MBP's screen and an external 24" Dell. I will be using it for coding, Photoshop, Web Design and surfing. I might play a game occasionally but it's by no means an important consideration, I have consoles for that after all. I will probably want to do some video-editing at some point but I'm not talking major, high-def stuff, just the usual nonsense for YouTube etc. The reason I'm considering the 128mb card, rather than the 256mb, is the astonishing price gap between the two 15" MBPs. The low-end 15" MBP, once upgraded to 160GB, is £1349. The high-end 15" MBP is £1599. All that £250 difference, almost an extra 20%, gets me is a .2Ghz faster CPU and an extra 128mb of video card memory! Everything else appears to be identical. I'm not usually a guy to stint on his toys but I'm seriously questioning if that extra video memory will really make that much difference - by way of comparison, the Dell desktop I'm currently using has a really old GeForce FX 5200 64mb video card and seems to be doing an OK job of running the 24" Dell at a lower-than-native resolution of 1600 x 1200... ... surely the more modern 8600M GT's 128mb will manage the Dell's native 1920x1200 and the MBP's native 1440 x 900 with ease? Am I being wildly optimistic here? Will the 128mb be fine or should I shell out for the 256mb? Would very much appreciate any advice, thanks. PS I should also probably mention that I want to use the 24" pivoted into portrait position (ideal for surfing and working on documents), so, it's actually 1200x1920, I presume that Macs can handle that as easily as PCs.