I am shopping to have a new 7 X 15 dual axle trailer built. I want two 5200lbs axles with brakes on it, for a 10.4K gross rating. I am confused about which type of axle would be best for me. Could anyone tell me of the pros and cons of the following types:? 1) Standard/straight, 2) Torsion 3) the Drop axle. I plan to haul up to three 400 sq/ft pallets of sod from time to time. I am currently leaning towards the drop axle so as to lower any gate clearance/slope issues. Any input on this is appreciated.