Lol at the frame latency comments! Oh no it takes 15 ms vs 5 ms for some of the frames to load!
Don't knock it till you rock it!
On a more serious note, the 13.4 and 13.5 drivers are the best all the 13.6 added was more opengl support from what I read.
Follow this guide, except replace...
Grab yourself a used 2500k or 3570k system and grab a 7950 for $250, it should be on par with the 670/760.
Less than $500 for a complete overhaul that will give a noticeable "edit:HUGE" improvement .
If you still want to spend around $500 grab the 8970 when it's released, supposed to be a...