CO is Laggro but not a spewtard, very positionally aware and runs 27/23ish
BU is straight forward TAG 16/12/4 over about 100 hands.

PokerStars 6max 100NL
CO has 120BB
BU has 110BB
I cover both in BB
PREFLOP:
Folded to CO who raises $3, BU 3bets to $11, SB folds, BB ??

What is the best way to maximize value here? Standard 4bet looks awfully strong, push looks strong but could be AK, so is a min 4bet here spewy? Calling seems suicidal vs. a Laggro CO who is going to play a wide range with those preflop odds.
I'm afraid I just need to standard 4bet and watch everyone fold. What do you do?