The two nicest steel deck open trailers I know of are the SureTrac (with the pair of 5,000 pound axles) and the "Albright Extreme".

SureTrac has a wide dealer network. The only place that stocks the Albright trailer is Hayes Trailer Sales in Russellville, Kentucky.

A comment above about how easy it is to overload a car trailer when it has a pair of 3,500 pound axles is very true. Not much more $$$ to just order the trailer with the higher capacity axles.

Also, cheap car trailers come with brakes on one axle. Ask the obvious question.