Recently I've been leaning toward the 24 lb Downtube Nova, but I intend to carry it on my back at times so I started to wonder about even lighter 20" folders. I'm worried that the only choices are going to be:
a) Lighter due to cheap materials that won't last long.
b) Lighter due to advanced materials that will be expensive.
Would a super light yet durable 20" folder for under $500 be too much to ask for?