Giant Defy Advance pro 3 2016 model

I am thinking about upgrading the wheels on the Giant. I could really do with some help/advice:

1. It is disc but both wheels are QR. I cant find the width of the rear anywhere i don't know if it is 130, 135, or 142 mm. Does anyone know for sure or how i can find out?

2. I looked at DT Swiss PR 1600 spline 23 (love that they will be quiet hubs) but dont know if they will fit as they only say 142mm?

4. Other ones are Cero RC35 disc - shop says they will fit. Any one got experience of these?