Bruce's!
After years of hearing "Grumman Gang" folks crow about Bruce's covers, I decided that the -8 was going to get one for those times she might sit outside on an overnight. Having seen a canopy get slowly scratched by a single-layer, unlined cover, and being total paranoid about scratching the -8's big bubble, I decided to go with the standard-weight, lined cover. Not cheap - but then neither is a new canopy! They come custom made, with your N-number on the side, and trim colors matched to your paint (or, in my case, to my future paint...)
Yeah, it's a luxury - but it really is outstanding! (And comes with a matching bag...)
Paul