You will find supporters and detractors for every make and model of 5er on the planet. Are the units you are looking at being sold by a dealer or by the owner? If a dealer, I would insist on an operational check of ALL operating systems in your presence. I would also use the same list as for a PDI (pre delivery inspection) of a new unit. With an "experienced" unit you must expect s few nicks, dings, and problems here and there but at least you will know what they are before you write the check rather than afterward. We have a Montana. It is built by Keystone (who also makes Challengers) and have been very happy with our unit. But Keystone makes clinkers here and there (like all manufacturers) so every unit is kind of a "random" shot. I would not be as concerned with the manufacturer as with your best assessment of the two units in which you are interested.
Bill
