The R9 270X is exactly $200 USD and will get you some excellent performance. However if you can stretch to $240-$250 a GTX 760 would be a good bump in performance.
Honestly though you would have a good time with either at 1080P.
I recommend MSI for almost everything, although Gigabyte is also great. Some example cards would be:
Great GTX 760:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127745
MSI 270X:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127761
Gigabyte 270X: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125476