Nice rig!!
I love my 26. Got rid of my kamado and don't miss it at all. In a nutshell the kettle is more versatile, easier to use and up there with temp responsiveness as the kamado. Easier to move around and less chance of breaking it, dealing with the seals etc....
I would definitely get the SnS. I use the SnS about 98% of the cooks. I actually quit using the vortex because I got just as good if not better wings and chicken in general with the SnS. Not knocking on the vortex at all but after the SnS I have no use for he vortex. You can definitely go with a regular SnS instead of the XL. I got in on a sale and picked the 22 sns deluxe for $50-60. IMHO the difference is very minimal. If it's one thing I'd recommend highly it is he Slow N Sear deluxe.
These are some grill fried wings using the SnS from some time ago. Crispy just like the vortex. Pic is of the 22" but same results in the 26 obviously.
As far as drip pans, I ordered the drip pan for the 26 and turned out back then it was the same size as the 22 drip pan. Bummer because what is the point when I can't catch all the drippings like I did in the 22. Apparently now they make the larger size pans but if you're using to catch drippings only don't waste your money. I have been using HD aluminum foil cut to size to cover all of the bottom. After cooks I just fold and toss it away. I hate gunk and grease and especially chicken grease. Also works a nice shield like the drip pan.
Pertaining to the easy spin grate, the 26 already comes with a solid stainless steel grate to begin with. I'd rather get something else. I picked one up but only because I'm building a 26 cart and didn't have a grate for the new one and SnS was no brainer as it's solid and cheaper than getting one from Weber or anyone else.
I'll do a write up soon but here is my 26 cart I'm just about finished with