Hi and welcome to the forum. Of your choices I would recommend either the Wave or the Charge+. The BO coating is pretty durable, it can scratch but only adds character to the tool with use. The BO is only messy when new but once you clean off the excess coating it i'ts fine. The Charge would also be a great choice. There are no plastic parts on it the handles are Aluminium. Only you can decide if it's worth the extra cost. The pocket clips work just fine on both models.
I'm really interested in the Charge AL Prep Kit, but I'm not sure my boyfriend would like the red (although I do). I'll have to think of a subtle way to get his opinion without giving away the surprise. Does anyone have a picture of one opened up with the tools out?