A demo would be a good plan. Try a few different bikes, light weight and full fat, it will give you a better idea of what will suit you best.
I can demo a Levo and an SL back-to-back and I've already ridden an EX-e so am across that one but yes, will be looking to demo where I can and compare!
Also, with the question about full power or super light models, take into consideration any changes in spec you might make.
I've altered mine pretty significantly with heavier duty items to match how and where I ride. It put an additional 1.7kgs on the bike. It's now at just under 21kgs so be mindful of that.
Bike rides awesome btw, even with my heft on it.
Honestly, the SL Comp spec is pretty sound. The forks might get an upgrade (or a swap for the Durolux if I can get a bike before I sell the Prime), and maybe some HS2 rotors but looking at the SL its pretty good. The Levo Comp is a reasonable spec, but as Spec are selling the Expert for $600 more with a much better spec I'd likely stump for that
If I go for the equivalent spec EXe then nothing stands out too much other than the dropper
With the Giant, the touch points and wheels are the obvious standouts but the lower cost makes it more palatable. Also comes with Performance spec forks, which is better than the Rhythms on the Spec and Trek
I'd probably look at inserts regardless as well, given my bulk!