Just got to 5th prestige this last 2x XP weekend and I might stay here. The Viper emblem is pretty sweet and I have all 10 of my classes, so I see no need to prestige again. Maybe on another 2x XP weekend, but for now, I'm fine with my Viper. Which reminds me of my favorite car:
I'm 8th prestige - with Diamond Assaults. I'm currently working on Diamond for SMG's, which everyone has already =P. Double XP weekend, I jumped up 2 levels and it was tits!!!!