Well, I am a game developer. And my job involvs compiling video game levels which can take days to weeks on my current PC - time I could be using for actual work. To my calculations these 2 duel cores will decrease my compilation time 8-fold which sounds very good to me and that's why I am going for it. Additionally I very often find myself using a number of different applications simaltaneously as my work required creating separate models in one program, designing textures in another, typing code in yet others, and putting all together in a 3D editor.
However, aside from acutally creating the games, I need to test them. With newer engines and larger, more complicated worlds fps often become a problem for me. So I am also trying to make my machine a higher end gaming PC that will showcase how advanced gamers in the near future will be experiencing my products.
So what exact problems will I be running into with this set up?