R9 280. It's even cheaper than $200 ($170) after rebate. This card will give you beast performance and ultra game settings ^_^. I wish I had one...http://www.newegg.com/Product/Product.aspx?Item=N82E16814127789 and you get 3 free games with it!
No it doesn't...Maybe if the 270x is oc and the 280 isn't then in some cases it may beat it, but why take a risk in oc that card when it doesn't even need to be in the first place.
Regardless, I have never seen a 270x outperform a 280.
now since you fine gentlemen have been so helpful, best budget 20inch+ 1080p+ monitor?
I think that fits within your budget
PCPartPicker part list: http://pcpartpicker.com/p/KPk6RB
Price breakdown by merchant: http://pcpartpicker.com/p/KPk6RB/by_merchant/
Monitor: AOC i2267Fw 60Hz 22.0" Monitor ($119.00 @ Newegg)
Total: $119.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-12 18:23 EDT-0400