Good ole Revo drives.
I wish they started lower than 240GB @ $600 and I did not plan on RAID 0 two Vertex 3 120GB (which would be cheaper and just as fast btw) or I would defiantly own one those over a SATA.
Also if you are like me and have 2 GPUs and a dedicated PhsX card or just a crossfire or SLI setup you may run out of PCIe slots if your MB does not support it. I already have a tuner card and a sound card, so if you have other add on cards too, it may get tight in there.
There is also case airflow to consider.
It depends on your setup and price range, which as I am sure you can tell by now, would be good things to list whenever you make a post here as you will get better answers to your questions if the posters know these things.