Hey man, i would suggest you the following
Cpu: Intel Core i7-3820 3.60GHz £229.99
Mob: Gigabyte X79-UD5 Intel X79 £229.99
Gfx: Buy a quadro/firepro
Hdd: definitively an ssd for primary
Ram: 12 - 16Gigs should be fine
I have a dual xeon setup and am using a quadro 4000 it's stable and excellent viewport performance.
The new generation cpu's from intel perform very well. Now about the graphic card since you are not interested in vray RT both nvidia and ati will do your job depends by your budget.