Generally, I just keep using my trusty rusty grates.
However, I recently picked up a newer 26, which appears to have SS grates so I'm guessing I might get spoiled.
Some time back, when looking at a kettle, I noticed the guy had what appeared to be a porcelain coated wire grill.
I also noticed that you can get non-Weber porcelain coated wire grates plain (but with handles) for pretty darn cheap. I was thinking these might work fairly well on smokers, stackers & the like because the flip up grates are not necessary. Additionally, because the temperatures tend not to get as hot & what get on there basically winds up less crusty & might be fairly easy to clean on cold porcelain or using something gentle like the wood scraper stuff (mine is actually a $5 long handled wood restaurant cooking paddle). In another thread, I remember reading that another type of porcelain coated grates needed to be cleaned gently or while cold to prevent damage to the porcelain coating.
Wondered if anyone tried these on a smoker, stacker, elevated grate, whatever and what your experience was.