get a DFI (only if you got previouse experince with comp building or if you like to lear by trial by fire) expert (if you got enough money) ultra-D (if you don't) crossfire (forgot name) and a opertron dual core s939 and over clock that up to 3.2 GHZ (if you get one of them super chips, they reguarly OC to 2.7~2.8 least i seen was with some vaule ram and 2.6GHZ, all of these are faster than anything stock.... all these are reached by air, not my phase chill or anything, but air.... someone had his on stock cooler on 3 GHz
or get a single core opertron s939 and maybe reach 3.2 (maximun with SI-120 and some 120mm fan)
if you wish to OC and not get DFI go with abit or epox or something asus is not bad, but for the price your getting, a DFI expert is offering a hella lot more stuff....
BTW if you want to OC, do not skimp on ram, or else get something with tight timmings and put them on a divider