[Isura]

[ QUOTE ]
Still borderline at 6-max, at least to me. 50/50 call to raise ratio. If you call, you aren't just playing for set value. You can also play poker against your opponents.

[/ QUOTE ]

I think it's far from boarderline at 6-max, and this should be a standard raise at full-ring too. The CO is too good of a position, why do you want to limp in and let button come in and have position the whole hand? Also, the limper will call with any pocket pair and check/fold most flops when you raise. When you limp, you end up in a spot where he loses nothing when he misses on the flop, but he'll extract something from you when he hits a set and you are playing a lone pair. Protect these middle pairs preflop, they are strong hands in position.