Personally I would prefer a montana over a zumo for the fact that I can setup multiple profiles for the type of tracks I want to explorer. From what I have seen the zumos don't allow this(correct me if I am wrong). I currently use a 62s and this suits nicely for the topo maps I use. Would be interested in some type of montana package, ie rugged amp mount etc.
If you don't want the piss taken, stop giving it away!