I am tweaking the 180 build and will have 3 250w MH and 4 48" t5 actinic bulbs in the canopy. My plan is to have 4 fans pulling fresh air in the the sides (2 on each side) and 2 more fans on the top of the canopy as exhausts sucking the hot air out. The tank is in the living area so I am trying to keep noise down the best I can. So does anyone have a fan recommendation for me?