I already replaced the stock fan with the Scythe Mugen. Reason for that was that the stock fan was incredibly loud, even on the "more quiet" setting (it has normal mode and performance mode, on performance mode it sounded that my PC is gonna go airborne any minute now

).
Scythe brought the noise level back to normal and it also cools more efficiently as the cooling element is about 4 times the size of the stock one.
Merc, very good points on your post and trust me, i didn't buy all this stuff just to run it on stock

So, i will be more than happy to learn more about oc'ing (i know a little already, but nothing too complex i guess...) and this Winter War thing might be just what i need.
I did a -*test*-('") run on 3DMark06, the score was something around 14,5k. I haven't got those other -*test*-('") softwares yet, but i will be downloading them in the next couple of day, so i can start getting those stock results.
One question, my memory is now running at 1066Mhz (SLI ready memory is enabled on BIOS, so it automatically set it to 1066), but as my memory is Corsair Dominator 1066Mhz, it still counts as stock, right?