Thanks for the feedback everyone - would those suggestions come in sub 1500? Or ideally sub 1400? Given that I probably won't upgrade anything else on my Giant XTC Advanced 27.5 2http://www.giant-bicycles.com/en-gb/bikes/model/2014.giant.xtc.advanced.27.5.2/14999/66605/
(well, maybe upgrade the bars too), I'd like to get as much sensible weight reduction as possible.
I totally forgot about the LB option, ophiravina, is there a reason why you would not buy direct from LB?
It's not that I have bad expirience with LB, I just have a very good expirience with aliexpress. they have a good buyer protection. I ordered from there about 6 times and on one of the times the package was lost in the mail. the seller didn't want to send me again the product, so I just sent a messege to aliexpress and they gave me full refund, no questions asked.
I saw on aliexpress alot of chinese carbon wheels and they are similar to LB wheels. therefore, I would prefer to buy wheels from there and not from LB, I not sure that LB have a buyer protection like this.
I've seen on aliexpress a 29er wheelset with a claimed weight of 1450g (novated hubs), so I'm pretty sure you will find 27.5 wheels that weight less