ST2358016 sidewalls are far stronger than any LT tire. That's what they are made for, to minimize sway. I got Firestone Transforce LT2358516Es om my Jayco when I got it used and they gave me no trouble for 2 years. One started losing air, and the pinhole was in a bad spot. The 09 date code persuaded me to not replace just one.
I started shopping tires, load ratings, reviews, ratings, comments here, etc. I must admit I have an advantage with all of this as I am in the tire and auto repair business. 
I went with Carlisle ST2358016E RHs. Rated at 3520 lbs, with the highest satisfaction rating there is in trailer tires in this size. I was considering the Marathons until many many contacts in the tire industry suggested otherwise. I was concerned with the speed rating of ST tires but I never tow at 80 anyway. Actually ST tires do not have speed ratings like Ps and LTs do. 
The cost difference also surprised me, as the Carlisles cost me $99 per tire, and the 2358516 LTs were in the $190 range each. Discount Tire Direct has the Carlisles at $122 with free shipping. That was the best price I found online. I'm buying at pretty deep wholesale, but you can get close.
My Jayco is sitting at 9000lbs on the axles/2700 pin loaded for camping, so I have 5,080 lbs of "extra" capacity. 
I'm sure that many will disagree, so have at it. I'm a big boy, you won't hurt my feelings.