he was looking at 780G boards, most of which are ALSO limited to 95watts... that means putting a 125watt CPU on it, or ocing, will LITERALLY cause the capacitors to explode.
AFAIK only board of the three he suggested that supports 125 watt CPU is the gigabyte one (I am not sure it is that exact model though)... and it will NOT support more, that means NO OC!
If he wan'ts a phenom he will need a 790 board, not a 780G. (the 780G chipset is the best around, but the mobo makers are skimping on power circuitry because they feel it is a "budget board").
I agree with mark, if he is replacing the CPU + Mobo at the same time, then getting a Q6600 + DS3L mobo will be the best idea right now.
I am UNDERVOLTING my Q6600 while overclocking it to 3.0ghz on a gigabyte EP35-DS3R (the R means raid, meaning i use the intel northbridge variant with 2 extra SATA slots and better raid, i needed the SATA slots. It should OC the same as the L varient, since the OC is dependant on the north bridge... although AMD got a new southbridge that has a direct connection of sorts to the CPU in phenom that somehow makes it OC higher).
But if he wants to get a phenom, then the 780G is a bad choice. Only 790FX.
I don't see why waiting for the 750 southbridge is important. Aside from features maybe. 100mhz extra OC is nothing to write home about, and they will most likely cost too much extra to make it worthwhile.