I love my TCR SL3, but I'm glad I got it before they shifted away from DT Swiss wheels to their own OEM wheels. My DT Swiss R1700s are rock solid and haven't had to be touched in four years and I weigh as much as you do. Giant makes great bikes, but I think the wheels they chose on my model year are one of the best things about the bike. I haven't heard any mass complaints about their OEM wheels, but they certainly don't have the experience building wheels that DT Swiss does.

None of the spokes were broke at a nipple , all broke at the hub.

i broke a spoke about two weeks ago and i feel that it sometimes is the mechanics negligence,
i felt the mechanic didnt tension the wheel right