PSA Sabre or M&P sport 3?

I’m in the market for my first AR! I’ve basically narrowed it down to either a PSA Sabre 13.7 or a M&P sport 3 looking for something under 1k that will be very reliable and well built. I was thinking about a IwI Zion but it’s a little more then what I wanted to spend. What are your guys thoughts? Or is there another model I should be thinking about?