First HID Cabinet Grow

Some of you may have followed along with my start up. I was using cfl's in a small small cabinet. I have just setup a 1.5'x2'x8' closet into a final veg/flowering unit. The smaller soon to be 2 chamber cabinet will be used for clones and a mother. I am using 400w MH for veg and 400w HPS for flowering. I have a switchable balast vertical industrial fixture. For the time being I have set up the basics of the closet-70cfm Exhaust fan, light and a 50cfm intake fan. I just finished this today, and it seems the fans may be a little noisy, will have to work on that. I might have to build some kind of enclosed hanging unit to prevent resonating sound. I have turned on the light and fans and am checking the running temp to see if I will have to change anything or upgrade. For now I am leaving the walls painted white and will soon be installing the mylar I ordered...if it ever gets here. Hmf. Anyways...thanks ahead for the input and ever so helpful advice, happy growing!

My start up...http://boards.cannabis.com/showthread.php?t=88114