I don't think either of them probably has 34 in their range, although you haven't told us where they limped in from or how they play preflop. (You were first to act so neither was in the SB, right?) So I assume that I can take 34 out of their range. I'm also taking 52 out of anybody's range. Also, I know that my opponents can NOT take 34 out of my range, since I saw the flop for free. So I think a smallish CR here is good. That shows crazy strength and should scare the crap out of anybody who doesn't have a flush draw or a set.
The problem comes if either of them is good enough / aggressive enough to push with a flush draw here. I doubt they would be. I think against most opponents, if they push over your check-raise of a bet and a raise, they have a set or top 2, and I can fold. (Combo draws are possible but unlikely ... I suppose
[3c] or whatever is possible and could also push.) If they flat call I think they have a flush draw most of the time. AK/AQ shouldn't have limped preflop (again depending on their preflop aggression and position, this could be wrong) and AJ-A6 should instafold to this much heat.
Smallish CR and fold to push, look to play the rest of the hand as if you're ahead if they flat call unless a flush hits. If they both call, proceed very very carefully. That's my answer. It probably sucks but it's the best I can do.