Running different tyres front and back

[eraser]

I've tried all the tyres mentioned (and others) and in my experience the Continental GP4000S Black Chilli is the one I've had the least punctures on.

 

Re. pressures, when I started road biking I was obsessed with rock hard tyres of 9 Bar but over the years I've some down to 7.5 Bar at the back and 7 upfront, where for my weight of 80kg, I find best comfort/grip/rolling resistance compromise.