In dire need of GFX card

I need help /comp/
My old PC got fried, and I'm stuck with this Cooler Master CMSTACKER / ASUS P5GD2 Deluxe job.
The GFX card is the ASUS Extreme AX300.
Can barely run lotro.

I've only got about $350 to spend at the moment, and I am in dire need of a decent GFX card.

Any suggestions, or will this http://www.newegg.com/Product/Product.aspx?Item=N82E16814150228 suffice?

>>7 Fails At Capitalization.