Katabatic, EnLIGHTened Equipment and Zpacks all make really nice quilts. The EE ones are smokin deals. The Zpacks ones are the lightest and the Katabatic ones look the very professionally made. I've got a 30F Zpacks 'sleeping bag' but without the zipper so it's a quilt, except I had joe put a zipper in the footbox so I can open it right up light a blanket on hot nights. It's 15.4oz and it would be a little light if you didn't have the zipper in the footbox, but I like this option. You could probably get a 40F one for 12-13oz. I use my 30F one for nearly 4 season use, by wearing other warm clothing inside if need be.
Solar panels are really cool. The concept appeals to me, but the math just doesn't add up. For trips up to probably a month without resupply, it would be more weight efficient to just bring more batteries than a solar charger. Maybe the math would add up better if you had a ton of electrical gadgets and a really good solar charger + nice weather, but at this point I think it's more of a gimmick still.