You could get alloy hexes, but if your driving style stays the same, that will as you say melt the wheels eventually with the doughnuts lol.. If you upgrade one part, something else weaker down the chain will break, its just a viscious circle and a money pit!
For me, part of the fun of the hobby is fixing it again once I've been out and trashed it lol.
My mrs does her nut coz I'll spend hours in the garage with 'em!