Is the Core 2 Duo MacBook Snow-Leopard ready?

As in, will Snow Leopard be able to boost the performance using the 64-bit technology compared to ordinary Tiger or Leopard on this machine? I know it requires 64-bit apps, was just reading about it, but in general the OS should be quicker and more efficient, yes? Are all of the Core 2 Duo Macs going to see an improvement or are some models too old?
I'm thinking about getting a MacBook, seen a refurbished 2GHz Core 2 Duo model with Leopard installed (includes Leopard discs etc) for £599. Worth it, with the potential to go fully 64-bit with Snow Leopard at some point in the future?

System specifications for Snow Leopard have not been released, and probably won't be until it's much closer to release. No one at this time can say what models of Mac it will run on and what performance gains will be experienced on any particular model of Mac.
But if it's a choice between a Core 2 Duo Mac and one with the earlier Core Duo processor, I'd opt for the Core 2 Duo system, budget allowing. The Core 2 Duo is a better processor, and the Macs that used it have other improved features that would make having them worthwhile unless you're just really strapped for cash.

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