How much faith do you have in Chinese carbon ? Willing to go used? How much are you willing to spend? 1kg is a lot of weight to loose on a bike that is already decent. I'm sure you can cut a couple hundred grams off the wheels but that is going to be a pricey option new. I cut 2lbs off my rigid by upgrading to a set of used Stan's Crest wheels for $250us but that bike had insanely heavy wheels on it to begin with. A recon gold is a decent fork so kind of hard to recommend upgrading that for a ton of money but slap a carbon rigid fork on there and you will loose a lot of weight.