Hope this is in the right place, hard to know where to put it! Basically, I have a windows gaming rig in need of a new gfx card, I want one with mini display so I can use my 27" iMac as an external monitor. Can someone recommend a suitable card for hopefully around $200-$250 that will do the job for me? I have Battlefield 3 in mind for my next purchase so needs to be able to handle that ok. Thanks folks.