A best bet would be the first setup with a i3-2120 and a H61/H67 mobo for about the same cost as that A6-3500 and A75.
You can see the A6-3650 (500mhz faster than 3500) Vs. the i3-2100 (200mhz slower than the 2120)http://www.anandtech.com/bench/Product/403?vs=289
It's what I would call a major pummeling. You really can't even compare them, it's not even fair.
You don't need 12GB of ram, 8GB is already overkill, but it's cheap.http://www.newegg.com/Product/Product.aspx?Item=N82E16819115077&Tpk=2120