For what you want, the relatively cheap
Gigabyte P55M UD2 would work just fine. If you aren't doing
serious overclocking and or you don't have any particular need to put tons of expansion cards in the machine then you can't fault it really. This board can still clock though, really well, better than you would expect given it's total lack of cooling on the mosfets and the fairly modest power system.
There really isn't any particular reason to buy the expensive high-end boards if you aren't going to use the features they offer, i.e. better crossfire and SLI capability, the UD2 only has 1 x16 PCI-E and a x4 PCI-E, rather than 2 X16s or more (although the Lynfield controller can only run an x8/x8 if you are doing 2 way crossfire or SLI anyway), also you have to ask yourself if you really
need the monster power setups (which you pay for), like 16 or 24 phase power etc, or diag LED's and the like.
If you are just going to build a system, run it at stock or with a none too aggressive overclock and then put the side of the case on and leave it, rather than keep fiddling ...then the UD2 or one of the other sub £100 boards will serve you very well indeed I think.