In a complete departure from my previous post I've gone for a monster Ivy Bridge setup
1 x Asus P8Z77-V PRO, Intel Z77, S1155
1 x LN 42833 - Intel Core i7 3770K S1155 Retail
2 x Corsair 16GB (2 x 8GB) LP Vengeance 1600MHz DDR3 240-pin DIMM CL10
1 x Noctua NH-C14 Top-Flow Flexible CPU
It was worth paying £6 more for the retail CPU for the extra 24 months warranty (and it wasn't on pre-order like the OEMs).
Benchmarks to come!