I love my 96 watt coralife quad fixture. Its not in use at the moment because I have upgraded my tank, but I was very satisfied with it. I used it over an 18 gallon tall (same footprint as a standard 10g, but taller. It got plenty of light to all areas of the tank.
I did do a "mod" to it. The crappy fans they included were loud and buzzy so I removed them and epoxied an old computer fan (80mm) to the top. I got a lot more airflow and a lot less noise. Also, the power connectors inside the fixture for the original fans hooked right up to the PC fans connector!
I highly recommend the quad, you should be able to keep anything in a 10 gallon with that light.