I got the ventech inline fan aswell. I don't use it for my lights I used it to bring cool air from outside, to the grow room (when I live up north). You should be good with the items listed.i have a roughly a 5x5 tent that is 7 feet tall so 175 cubic feet, right? so i need something larger than that number? I also have to cool my light and pull it through a filter.
I found a 6" - 440cfm Ventech inline fan for 63 shipped off ebay, i plan on getting that with a speed controller and filter all for around $150.