Will the 650 Earthwatts be enough? Cause I want to overclock the 955, also I will be running 3 HDDs, the samsung and my two HDDS I own. I would like to get the Earthwatts one, but if it isnt enough Id go with 700w OCZ.
Although it (strangely) does not list the amps required on the 12V rail, I don't think you will have a pb.
You wouldn't need that much for overclocking. Instead of pulling 125W you may end up pulling 150 for that CPU. Not that much difference. Same with the ram not much more for a little additional voltage. If you overclocked everything including video card you may pull an additional 50-60W from the PSU.
The GA-890GPA-UD3H is a very good option. However, if you want to do cf I would go for the new 890FX chipset, or the old 790FX chipset.
Anyway, as you can read in the followind review, the mobo that is in your local store is solid product.