Car Haul Trailer, Steel vs Aluminum, Which Would You Choose?

I have a heavy duty, diamond plated, 16' flatbed trailer that I haul with my 03 Hemi Ram 1/2 ton pickup! This trailer was used to haul a guy's sizzor lift, which are very heavy, and the trailer itself is very heavy! With that said, truck and trailer have logged 1000's of miles together! The truck now has 240,000 miles, and I just hauled another car home last weekend! Can't tell me that a 1/2 ton truck is too light duty, mine hauls this trailer fully loaded anywhere I want to go!!!