R9 270, R9 270X, 7950, 7870XT, 7870 $150-200 range all good options for 1080p
R9 280X if 7970's are not available are also in the $300 range.
R9 290 is $400-450 once the custom cooled ones come around, they should be a viable option
GTX780 $500
R9 290X $550-600 once the custom cooled ones come around, they should be a viable option.
GTX780Ti $649
So you can pretty much take your pick with that CPU at the budget you have.