Grow Tent Setup

Hello everyone, I'm just getting into the world of grow tent cultivation and I wanted to know your opinion on this..
I've got a 32"x32"x63" Mylar Grow Tent, now I'm buying a 400watt grow light system with an Hps+Mh bulb. Should I get a Wing Reflector or a 6" Cool-tube. I'm asking because I want to know what is easier to keep ventilated?

a 6inch cool tube is easier to cool and alows the light to be closer to the plant giving better growth

Thanks for that! Really appreciate it