You propably don't want it but i have an E7300 here.
Hyper threading really helps, what purpose do you need a quad? The I3 at 4ghz is no longer a bottleneck for a single GTX460, but with two in SLI it would probably still be the weakest link. But I'm just suggesting it for now to save some money. I think you'll be really happy with the Performance of a 530.
Here' the cheapest board I could find with SLI support-
http://www.ebuyer.com/product/173539
A UD5 is really good, I don't know why it's so cheap.
OK I did just find this Asus for 120 instead of 135 on the gigabyte, but IMO I'd way rather have a UD5-
http://www.ebuyer.com/product/173450
The I3 is 90, the I5 is 160, so 70 pounds difference is pretty huge for not much better performance. Most I5 7xx's can hit 4ghz but with atleast 1.4x volts, and run much hotter to begin with. The I3 should atleast do 4.2ghz on low volts, so the higher clocks help plus hyper threading gives two extra virtual cores. It's about the equivalent of a triple core.