I went with the 5100s and it made a world of difference. Otherwise stock with the DuratracsI’m bone stock right now. I’ve heard the same thing and when I need new tires I’ll be getting 10 ply E tires, but for now it seems to do fine. I’m taking the TT 2.5 hours away in a couple weeks so I’ll really be able to tell then. I’ve also heard upgrading to bilstien 5100 shocks makes a pretty big difference. As far as I can tell, and I am by no means an expert, the weight distribution hitch makes the biggest difference.