A 65 watt compact fluorescent fixture will put your tank at medium high light or better. Whether this is enough light or too much light, depends on what you want to do with the tank. If you want to keep the tank relatively low maintenace, then this light fixture is probably too much. However, if you're looking to open up your plant options by keeping a high maintenance tank, then this may be enough light. It would allow you to grow all but the most light demanding species.
If you go with this particular fixture, you'll want to look into both CO2
injection and fertilization. Check out the Read this Sticky at the top of the forum for more information if you haven't already.
Anything between 5000K and 10000K should work well for your tank, it's more a matter of which color you prefer. The lower Kelvin ratings will look more yellow, while the higher Kelvin ratings will look more blue.