we need way more information.
what are your current system specs?
what res do you play at, and what games do you play?
and budget? thats 200 what? pounds? dollars? goldfish?
jumping ahead a little, this is one of the best options right now: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130562
thats assuming your PSU can handle it, hence why we need system specs.