Well, maybe you are a fan of the non-be's but I have used many AMD chips and IMO the 945 is not easier to overclock due to the fact that not all AMD boards are bus-friendy..... I know of more than 15 AMD (AM2+ / AM3) boards that hit a wall if you raise the bus to anything over 220Mhz....
Not trying to be sarcastic here but it is a fact that the BE's (550,720, 940,955 and 965 are the best and most effective overclockers out of the whole AMD lineup.....