There are plenty of options available. I personally will recommend the DIY method. You can make a DIY hood, wired, with ballasts for I'd say under $30-35. With all the wood, 2 48" light fixturexs, screws and everything else it only cost me $45 to make my diy hood.
for my 55 Gallon. Click the link for some information on how I made my hood and some pictures of it.