99 Preflop

[Backstabr]

6-handed 10/20, good game. Hero is button w/ 99. Call, call, fold, hero raises (?).

I know raising is good: I'm ahead of limpers' ranges, I might knock out the blinds, I have position, etc. However, given that the blinds are loose, I'd prefer to play a small pot with 99. My standard line is raise, but I'd like to hear people make a case for limping that's more articulate than just a gut instinct.