On the sensible side. We operate the V2500-A1, A5 and the CFM-56. The V2500-A1 has had a few problems such as the stage 4 failure linked to the rotor bow. That has now been sorted after a number of modifications.
The CFM-56 seems to be a very robust engine. I echo the comments above. The V2500-A1 is a slightly more efficient engine (low SFC) and the CFM-56 burns a little more oil/fuel but is more robust/liked by crews (low start times).
DTG