Do you like a sleek tube, or telescopic? What kind of button, top side, bottom side, bottom, bottom flush? Do you plan on running different battery sizes? Do you want your attys to flush mount? Will you be using a kick, fuse, or nothing? There's a mech out there for everyone, it just depends on your preferences, and if you don't mind clones you can find one in just about any price range.
Personally, I really like my pisces clone.