I might as well go all the way up. Once I prestige, I hit the double game xp for two hours. Within those two hours of game play I usually go from 1-6 in one game, then 6-20. Every prestige I've worked on maxing out all the pistols, and so far I've hit level 30 with the M4, and I'm only around 46ish on this prestige.
And you said you weren't going to prestige at all! I knew you wouldn't be able to resist...