Might want to take a look at this - BF3 http://www.tomshardware.com/reviews/battlefield-3-graphics-performance,3063-13.html
In terms of upgrade path, the AMD path currently is to Bulldozer.
Upgrade path for Intel SB is to Ivybridge (Better upgrade path).
Above artical shows a lowly I3-2105 beating the FX 8150
Also, on Nr of cores.
With Intel I7-2600k, going from 2 -> 4 cores NO Difference.
With FX 8150 foing from 2 cores to 4 Cores to 6 cores -> 8 cores = 71.95->79.14->79.03->78.98
Bottom Line: I stick to my recommendation, spend a little more and get an I5-2500 (for MB get one that will alow upgrade to IB - When IB drops in price as IB is currently to expensive.)
Looked at the link for the two MB. Yes They are LOW cost, For a good reason They are VERY low end with No real upgrade, ie sata 6 or USB 3 outside of using a expantion card, and then taht is a POOR subsitute for a real sata 6/USB3 enabled MB.