Leather/Nappa or full Leather?

Personally, I don't think you can go wrong either way. Part of it comes down to color. Therefore, it is a bigger debate if you want a black interior, since that can be had in the standard Suede/Nappa interior OR the signature leather interior. I have the saddle color leather in my current '15 Summit, and love it. However, the Sepia Suede/Nappa color was just a bit too "orange" for my liking so that ruled that option out. Once I decided I wanted something different other than the usual black, that meant I had to go for the full leather in Ruby Red. The premium leather interior is nice, since it has leather on a bunch of the areas that are otherwise covered in cheaper plastic on all other Grand Cherokees. However, I don't personally know if I would have spent $5k for the option if I could have had the red color in the standard Suede/Nappa. Also, I do think that the white embroidered "TRACKHAWK" logo on the seats looks better and more distinctive in the base Suede/Nappa interior vs. the embossed, less noticeable logo in the seats of the signature leather interior. Either way, the "supercharged" logo on the doorsills should have been illuminated as the "summit" logo is on my current Jeep.

Backbreaker...

I agree with you regarding resale for the tow package. I've got nothing to tow but I simply had to order it since it's the only vehicle of its kind, which has to be a plus for resale purposes. What else comes from the factory with 707 hp and a built in tow package? Rhetorical...Nothing else of course.

The upgraded leather is 7k since you need the optional stereo upgrade which probably isn't worth the money. I actually like the sepia nappa suede leather better than the other choices as well, but even if I preferred the upgrade I couldn't bring myself to pay an extra 7k for it when that is adding about 8% to the overall price of the car. Maybe that 7k is more pallatable if it were on a vehicle twice or three times the cost of a Trackhawk, but it's disproportionate for this vehicle considering its MSRP plus also what you get for the additional 7k, which to me seems like more of a color change than anything else.

While I think the tow package will help with resale, especially at its low cost, I also think the money spent on the leather/stereo package will depreciate very quickly once you drive it off the lot.

I agree completely. The leather/stereo upgrades will not add any value if you ever sell the vehicle. For me, though, I was going to get the better audio system anyway, since the difference is pretty noticeable between the Alpine unit that is standard vs. the Premium HK setup (like I have in my current Summit). However, the tow package is valuable in my opinion even if you don't tow. It includes the full size spare tire (that can be had for $395 I think) and heavy duty engine cooling which are good things to have no matter what. Plus, its pricing seems very reasonable compared to the overpriced leather and audio (which should be $1k to upgrade as it is on the Overland vs. the $2k they gouge TrackHawk and SRT buyers). The tires are interesting. If you live where it is cold, I would stick with the standard tires, since even if you don't use it in a lot of snow, the 3 season tires will be rock hard in the cold. Plus, they are actually the more expensive tire if I am not mistaken, so I don't quite get why FCA makes the 3 seasons an extra-cost option.

I am just a little concerned about the full leather seats being a problem with stretching and accelerated wear like the hellcat chargers and challengers. They have had a lot of issues with them. I hope they have resolved this issue.

Here are some examples of a 2016 Jeep SRT with Leather Seats with 16K miles. I really hope they have fixed this issue for the people who ordered full leather: