I have the same rig. Looking at you trailer, that is a big @ss rig.
Search up some threads under suburban 2500 and you will find some good info.
Couple things you will find...
The factory hitch is weak, which may or may not concern you. Different people have addressed this in different ways.
The motor is adequate a heavy trailer. Adequate. We don't get left behind much, but the thing really revs to do it.
That all said, we love ours. Four people and two,big dogs in total comfort. Wouldn't trade it for anything, and won't until a new 3/4 ton SUV comes out. Watch this space for my supercharger install that (I think) is coming up this winter.