1. pretty good and well rounded. how much does the akasha cooler cost?
2. the regular directCU II card will still be really good, just put a little overclock on it
3. i have no idea the diference, motherboards arent really my area of expertise...
The 680 is only 5% faster than a 670. That drops to 2-3% after overclocking, and it's 25-30% more expensive than one.
If that's not enough to convince you, look at it this way:
Both the 670 and the 680 max out the exact same games equally well. So why would you pay $100-$150 more for basically the same thing?
EDIT: As for the motherboard, I have a used -ud3h sitting around here somewhere from before I got into small form factor computers. I believe the difference is in the number of phase changers, as it was a great overclocker - it got an i5-3570k to 4.4 GHz with lower than stock voltages, and that was just with a Hyper 212 EVO.
Hmm, depends on your cooling situation. The EVGA Signature 2 is bloody amazing, as are the ASUS DC2 and the MSI Twin Frozor IV... but the Galaxy currently seems to be sweeping the crowd when it comes to cooling and overclocking.
on my country there is no big choices (yes its but when it comes its sell on 0.3sec bc we are waiting too long :=) ) so i can choose gtx670 and 680 igabyte one (but this is expensive ) or asus 680 or msi 670 one for now
If the MSI 670 is cheaper, then go with it - it's a good card, and a lot better value than a 680, as I explained above. (The only time I'd say to get a 680 is if it were basically the exact same price as a 670.)