Sure am on Win7Pro64
I have swapped out one of the Raptors with a Patriot Blase 120 SSD (all i had easily on hand), mounted onto the Western Digital "Ice Pack" adapter and even though it's sata III it seems to have settled without much fuss, not the best preforming SSD out there but it is connected to sata II after all.
I suspect the only two economical upgrades left is to fill out the ram, and then balance out a a possible graphics card purchase 