Anything to watch out for with Vista
Yeah. Instead of wasting your time mulling over SSD vs traditional, how about trashing Vista and installing Windows 7 first.
Traditional technology is mature, well developed and remains in common use. I don't use SSD on any of my machines, I push them hard, and I don't see a performance issue. Similarly, 99.99% of server deployments still use traditional technology because SSD=$$$.
SSD is not the solution to all problems, and infact if your computer is slow under traditional, you're unlikely to see major performance boosts from SSD.
SSD should be seen as a "tweak" rather than a first step. There's plenty you can do beyond defragging to ensure your computer is running at its best.