Ok, vista is great.
The only problems I've had is the Laptop my mom bought me was essentially too slow for vista, so I reverted back to my old PC and gave her the laptop. (Too slow as in too slow for Games/Bricks.)
Bling, most of my parts are in combos. Once I took the time too find good combos and such, it made my PC slightly better* and made it about 150$ cheaper.
*The combos had parts that were like in some cases 20$ more expensive than the original, but the combos saved up to 50$.
Edit: Also I noticed you are thinking like me, or you forgot. Are you putting your old CD Drive in the new case?