If you weren’t convinced that the most dramatic upgrade you can do to a Mac is install a solid state drive in its belly, check this video out.
15 seconds. Just 15 seconds. That’s how long it takes a 3.4GHz Sandy Bridge iMac armed with a Sandy Bridge processor and an SSD drive to launch all of its apps simultaneously.
Seriously, although the processor plays a part here, even the 1.4Ghz Intel Core 2 Duo MacBook Air with SSD is the fastest seeming Mac I’ve ever played with. If you’ve been hemming and hawing over whether or not to make a MacBook Air your next laptop, just do it.