Vista 64 vs. 32 ?

I am about to change my DAW setup later this year. Right now i use a AMD X2 4400, Cubase SX 3. This seemed to be pretty fast in the past, but as time goes by, it now feels slow and old compared to the new Intel Chips. Since Cubase 4 is still "buggy" and Vista 64 is not supported to well, i am doing some research.

So i found this interesting performance test:



Results in short:
1. Vista outperforms XP without any trouble at all
2. There's no performance advantage to Vista 64