If you need to see what's going on and are okay with using PBW properly you can't go wrong with Better Bottles.
If you need to scrub something to know it's clean you are better off with glass.
If you don't need to watch, I'm a big fan of buckets or conicals.
I've used most of them, some bigger and some smaller and they all work. To me it's more of a question of whether or not the activities involved in the proper care of the fermenter agree with you or not.