Need help deciding between 6 dif motherboards

Hi, wonder if I could get some help on this situation; budget is ~500 give or take, can be a bit flexible if necessary

I'm building my own computer (I would like to do some gaming on it, although not the most hardcore overclocking type stuff, some graphics/visual stuff, etc).....

I think I'm going to go in on this 'bundle' deal/promotion at microcenter for cpu/motherboard.

They're giving away a motherboard for free out of 6 different options.
http://www.microcenter.com/specials/promotions/AMDbundl...


I know I'm in for the Phenom II X2 560, but I'm not sure which motherboard to go with it. I do not understand motherboards very well.

There are three free options.

MSI-785GM-P45 AM3 mATX
http://www.microcenter.com/single_product_results.phtml...


BIOSTAR A780L AM3 760G mATX
http://www.microcenter.com/single_product_results.phtml...


BIOSTAR A785G3 AM3 mATX
http://www.microcenter.com/single_product_results.phtml...

and then you can upgrade to these other three for 9.99 more (which isnt a problem for me if they are worth it)

MSI 785G-E53 AM3 785G ATX
http://www.microcenter.com/single_product_results.phtml...

ASUS M4A78LT-M LE Socket AM3 AMD 780L mATX
http://www.microcenter.com/single_product_results.phtml...

GIGABYTE GA-MA78LM-S2H Socket AM2+ 760G mATX
http://www.microcenter.com/single_product_results.phtml...


The reviews on newegg seem to like the free, BIOSTAR A785G3 AM3 mATX, but the sample size is small


Anyone have any thoughts? Appreciated in advanced