For no hassle, the Mosters would be a better choice. I haven't listened to any of the Moster Turbines, so I can't comment on their sound. The Gold is supposed to be pretty darn good though, so I would have a tough time seeing someone not like the product.
I agree that the monsters are easier to fit and more comfotable in the long run to wear, but i do own the monster turbine golds and the monster turbine coppers as well as the custom 3,and while the monsters sound very nice ,the custom 3 just sounds better in nearly every way and is much more suited as an all rounder than the monster golds.
the golds have fantastic dymanic sounding bass ,very deep, and detailed ,packs a hard punch ,but to be honest unless your going to be eq'ing it ,it will simply be too much on some albums and they will just sound wrong ,the coppers are a better choise than the golds if you want an iem to use with lots of differrent music,and both the monsters are nearly double the price of the c3
Yes you are right ,there are lots of other iem's that fit into that price range so we do need more details on what povar is looking for