Nope, all the articles clearly state how poorly dual cores do.
(Third option) Try and convince your friend to spend £500, come back and we can spec you a good quad core budget gaming rig.......decent GPU included.
The Core i3 540 is also left behind by the Core i5 750 despite featuring Hyper-Threading.
During testing, we noticed that the game isn't particularly dual-core-friendly. We saw roughly a 25% decrease in performance when going from four to two cores.
It was also interesting to see that Dirt 3 really dislikes dual-core processors