Certified Jeep-aholic here.....
no such thing as a bad jeep, I prefer the standard transmission to the aute, becuase U like the fact it gives me more control over the gearing... but some prefer auto trans becasue they don't have to mess with shifting, its handier on steep grades, etc.
I would prefer the 6 cylinder over the four, just because I like the extra hrorse power, but the 4 cylinders are ok, I guess, and they come with 4:10 gearing stock from the factory.....
If your boat or trailer is anything bigger than say a 16' aluminum boat, I would suggest getting a cherokee, r grand wagoneer, like said above, the wranglers weren't made for towing, the short wheelbase can be dangerous when towing a load... . plus the larger jeeps give you the ability to carry more passengers and/or equipment... .
My advise is to be very careful about buying any jeep product, there is a major issue with becoming an addict like myself, and once you start with the mods, its just like the Dodge CTD, you can't stop... . beware

, but enjoy.....
kerryp
bastrop, tx.