I wouldn't bother with 150's. (Sorry Dez!!) Not worth it IMO. 150's are great for nano tanks.
I ran 2x250w SE XM 10k's plus 2x110w actinic over my old 75g tank which I took down last year. Pity it's all gone now otherwise I could have showed you it. Anyhow, wasn't m80 ballasts but it was a pretty decent colour. When I had SPS in it they coloured up pretty wicked.
Here's a picture from that tank's glory days..
