Upgrade from the "free" mobo. I have the 960T combo, 2 1055T combo's and an 8120 combo from MC.
The GA-78LMT board is fine at stock, but is horrible at overclocks. You run into a VRM issue. I killed one board on a modest overclock of the 960T, and I only have 1 extra core unlocked.
http://www.overclock.net/t/946407/amd-motherboard-vrm-information-list
Personally I would spend the $139.98 and get the GA-970A board. I have that on my 8120 and it is great. 8+1 VRM's.
I'm running the GA-78LMT - you are going to get rev4 since they stopped making/selling rev3.1 and it only has 3+1 which is beyond horrible - on a 555BE since I don't trust it on my 960T. The 555BE has the extra 2 cores unlocked. Can only overclock to 3.5 on that board since it becomes unstable any higher. On the GA-970A I overclocked it to 4.2.
Avoid that GA-78LMT at all cost if you want to overclock. Too easy to kill.
All my machines run DC projects 24/7.
EDIT: I see the Asus board is also only 3+1. Just not worth the potential to kill it and have to shell out $100+ to get a new board.
If you get the GA-970 board, you will also get the rebate. I have done this on 4 separate occasions with GA boards.