I'll give you my take when finally putting down my own hard earned money. As you know, if you've run across many of my posts, I am fortunate over the past few years to be able to get my company vehicles configured close to my needs to tow in varied conditions with my own unique loads and trailer. I've towed with:
2500s both gas and diesel
1500s 5.3 and 6.2, 6 speeds and 8 speeds
Escalades, Yukon XLs, Avalanche, Express 1500
(my old personal vehicle)
Never tried a 3500, as it is overkill for me and just didn't want one.
I've done the math every way, but sideways. Balanced my forcasted present and future travel conditions for percent of time, etc. Listened to my wife as to which ones were comfortable and easy for her (even now) to get in and out of, park etc.
I love a 2500 diesel, but don't NEED it for more than a projected 5% Rocky Mountain travel days.
2500 Gas was fine, but something about 2500s made my wife's sciatica act up and would get progressively worse. (I believe it was entry and exit causing this).
I wound up with a 2015 1500
MaxTow, 6.2L, 8 speed. Won't bore you with all the details why, but important to this thread is the fact that I am just below all the axle and GVW ratings with ALL my toys and equipment on board (on paper anyway, haven't scaled it yet....haven't even hitched to the new TV yet....darned winter, anyway) and I'm well below GCWR and max trailer weight.
In a nutshell, not too much and more importantly, not too little TV. The right tool for the job, by the numbers and my duty cycle.