7750 Kuma - I would have no problem with this if it was simply a temporary item, say for one or two months until you bought a good CPU. Otherwise, an Intel E5200 will run faster and overclock better, for the same price.
GIGABYTE GA-MA770-UD3 - It's not a good SB for overclocking (SB700) and the board itself isn't really a good platform for upgrading. DDR3 is cheap now, in some cases less than comparable DDR2. This trend will continue, and if you are building a machine to quickly upgrade, you have to now look hard at AM3. It was different 10 days ago, but this is the advice today.
I could go on, but that's a start.