On a limited budget, which do you think is a better upgrade option for the new MBP 15": Discrete graphics or larger hard drive? (would be buying the hard drive from a third party and installing myself) I've found that my current macs performs a lot better when there's a lot of free space on the boot drive. So there are some real, immediate benefits to a larger drive. Will the current 256MB discrete graphics card seem underpowered for Snow Leopard in about 18 months anyways? Any advice, links, etc greatly appreciated.