Bulldozer is AMD's upcoming CPU, new architecture, six cores, hoping to to compete with Intel's Sandy Bridge. Not sure yet if it will be faster clock for clock, but will at least be better priced. Looks promising none the less.
"I thought the more cores the more ram was required=quicker computer" is not true.
The software needs to be written to make use of those cores and HT. Dual core is still more than enough for everday use and gaming right now, not many use quad core let alone six.
Same with RAM, for everday use and gaming, you wont see it go pass 3.5gb most of the time, if that. So a 2x2gb or 2x4gb should do.
Revodrive maybe priced better, but does not have TRIM which means performance will degrade over time much much more. I would stick to the new SATA3 SSDs like Vertex 3 or even the even the Vertex 2 over Revodrives.