cheapest option is with the 805. You will be able to keep the gfx is you use an upgrade board like Bops. TBH with a £200 budget its your only real course of action for best results
The case only needs cost 25 quid to cover your needs and 20 quid will buy you a hiper psu to go in it. 35 quid for mobo 65 quid for cpu only leaves enough for a gig of ram and that will be slightly over 200 notes componant costs
