General :: Processor Selection For Box

I am going to order the parts and build a new PC soon. One goal I have on my new machine will be to use Windows as little as possible and use Linux. In Linux I will need to use an emulator/virtual machine of some sort for things like playing World of Warcraft or City of Heroes and running Photoshop. (No, Gimp is not just as good for my needs). I plan to have 4Gb, to start, of ram and my question comes to one of processor selection. I assume that running a Windows app in Linux would be one of the most system taxing things I could do. Would I be better served by more processor cores or a higher clock speed for these tasks? I will undoubtedly have an AMD proc. I have been considering the following.

Athlon II X3 440 3.0 Ghz.
Phenom II X3 720 Black Edition 2.8 Ghz
Phenom II X2 555 Black Edition 3.2 Ghz
Athlon II X4 630 2.8 Ghz
AMD Phenom II X2 545 3.0 Ghz

I am leaning towards the X3 440 (or 435) for the sake of cost so that I can squeeze a discreet video card into my budget but that it outside the scope of my question. Extra info just in case The Black Editions are very over-clockable with unlocked CPU multipliers. The Phenom II CPUs have 6Mb of L3 cache and the Phenom II CPUs do not. The question boils down to how well Linux and Wine are multi-threaded to make use of all available cores and what impact, if any, L3 cache has in a Linux environment.