In the 60 quid price range you can expect some loss of functionality.
You don't need to - the XFX 650i Ultra is available for £48 with all those features. And it clocks like a good 'un.
If overclocking a dual core is your goal, as stated by the original poster, buy the IP35-E.
He didn't actually ask for the ultimate overclock board, he asked for one that would overclock
nicely. I've supplied overclocking templates for all the boards I use and recommend, so I'm very comfortable with suggesting the EVGA over the Abit. If the IP35-E was
really such a good overclocker, why would anyone buy an IP35-Pro? The one
comparative review I have seen suggested the IP35-E was not remotely close to the IP35-Pro for overclocking, whereas I know the EVGA 650i Ultra is very close indeed to the dual-core performance of the IP35-Pro.
I have an IP35 Pro, A P35-DS4 and a P5K-E, an N650i-DS4, several P965-DS4's and EVGA's in the 680i and 650i Ultra flavours. In every case the motherboard is
not the limiting factor on the overclock - all those boards will outclock any current Core2Duo. I would discount the 650i Ultra and the N650i-DS4 for clocking Quads as they struggle to do 350 FSB with a Q6600, but the others are all much of a muchness with the newer BIOSes.
It's very trendy to shout P35, but the NVidia chipset boards are very quick, have superior sound and features and clock Core2Duos very well indeed. P35 for Quads, every time, but for Dual-Cores, it's not required.