I'm looking to upgrade my gaming system; I'm pretty casual at this point so I don't want to spend more than 50-100$ on a new CPU (I already found a good deal on a pair of GTX460 cards so that's covered) I'll be playing a lot of Supreme Commander on it and I'm hoping to reduce simulation speed issues- even on my 2.2Ghz quad i7 laptop I get crazy slowdowns with lots of units, despite the actual framerate staying high. relevant benchmarks are super hard to find, since everyone focuses on framerate (which stays high even on an 8800GT with any CPU) and doesn't touch sim speed with thousands of units. Thoughts on fast dual vs. slower quad for this oldie?