if your building your room from scratch give your self 6 and half feet.trust me i have the exact same space as you do with 2 600"s. i was running 6 buckets and its ok for the space but you have 0 room to move around in.im trying to switchto a 3 by 6 tray and it leaves me no room.as it sits now i shit you not i spend about 90 percent of my time lying on my side trying to work my way to the back of the room and its a real pain in the ass" seriously". as far as reflectors go your going to want anything that is wider that 22" .c.a.p make these rerlectors called the xxl i think there 28" wide and spread the light really well if yoused in conjuntion with the 600 watt,if i could go back and do it again i would pick up the c.a.p reflectors.good luck with your project.