Before making any hasty decisions, you might wanna give the home made cool tube a try, it is in my sig, everything will cost about $35. I currently have a 600W HPS in my 2 x 3 x 8 closet, temps are right around 75-80 with cooltube. And of course, good constant air flow.

It will most likely be the cheapest option for you. I have an extra bake a around if you need, $20 shipped. I am paypal business verified

Just putting that out there, you will be happy with the results of HPS over CFL, hands down.