Both gizmos look very kewlish to me and would be a great acquisition for them with bucks to spend. I have just a regular old cheap aluminum no frills type hood on my 400 watt HPS/MH combo lamp. Seems to work ok. Believe at least some of your heat issues could be resolved with a remote ballast as opposed to the attached ballast you have now which dumps its heat in the grow room. Notice the 400 Watter dont put out much more if any heat than a few 100 watt curly tail CFL's with the ballasts on the base.

Goober