Way to get back into the Weber game! For me, I put a LavaLock 5/8" x 1/8" graphite-impregnated fiberglass flat gasket on the bottom of the rim on all of my kettle lids and WSM lids before I ever put fire in them. They come 84" long which is enough to do a full 26" lid. I'm not a huge fan of stainless steel grates and I'd have my eyes on a set of Craycort grates for it at some point down the road. Slow-N-Sear Drip 'N Roast pan is also a nice accessory to have below the grate. I also never dug the 8" wheels on the newer kettles and Performers and I'd get some older generation 8" wheels or even Summit Charcoal wheels for it instead of the ones it comes with.