Look at the Hamilton Belize Fixture. I have the five foot model myself. It is a wicked fixture. Top quality as hamilton does, and very sexy looking.

I had JL bring mine in from the US, and I had it in about 7 business days, and it was only about $1080 for the fixture, bulbs, shipping (EVERYTHING IN). I got to choose the bulbs and the ballasts, I went with the 250W ballasts. Also comes with the legs or hanging kit.

Basically, it was a monster package and I didn't need to buy anything else. I would highly recommend this.

Here is the link to what I got: http://www.hamiltontechnology.com/it...g-Systems-1723

A four foot fixture will work fine, if possible get one with halides that can be moved, that way you can spread them apart a little more to cover the tank more evenly. I ran a 4 foot on on a 54" tank and loved it, 3" more on each side won't make much difference.

Here's a link to the beginning of my lighting set up in my tank journal. If you keep reading on you'll see that I modified it from 48" to 60" later on and changed the middle light to a 250 watt. Gives you an idea. I have a full sps tank now, for more info you can also look at the Tank of the Month link. I have sps growing sitting on the sand bed and it's a 24" tank. Hope this helps.