I too am looking for an enclosed trailer. I have done a lot of research on the different manufacturers....Here are some
trailex-very light and can be bumper pulled with most trucks.....
http://www.trailex.com/buycat.cfm?cat_id=93
Pace-top of the line with lots of add ons
Featherlite-top quality....
www.featherliteinc.com
Haulmark-more of an economy trailer..but have some higher quality
Lots of used trailers at
www.trailersforless.com
Good Luck!!!
Mike