The Momentus XT seems to be a good compromise (4GB SSD that caches frequently used parts of a normal HD). I know a couple of friends with them, and they say th

The Momentus XT seems to be a good compromise (4GB SSD that caches frequently used parts of a normal HD). I know a couple of friends with them, and they say that applications load vastly faster, and their machines also boot faster. It doesn't help with sustained throughput, but that's not normally a problem.