Another option, if you are wanting higher lighting, is to do like what I did with my planted tank. I have 2 48" fixtures, 2x260W, for a total of 520W lighting. And if you find the right fixtures, it will cost less than a lot of the other higher light setups. I think mine were $92.00 each when I got them, on Ebay.
55G Filstar XP3 - 16" Fire Eel
75G Medium Planted - Filstar XP3 Low Light - Established Feb 2006