[SpeedEuphoria]

That Coralife one should be just fine for you, people use the 2x18w on 29G tanks and it works good, so that one should be fine.

This one would be better IMO but it may be too much light.
http://www.bigalsonline.com/BigAlsU...urrentusanovaextreme242x24wt510000kfreshwater

You can raise it off the tank a couple inches to reduce intensity.