Aggressive tire on stock 16" rim?

Just bought my '03 King Ranch Crew 4WD and first order of business is a leveling kit and a more aggressive tire. Would like to keep the stock 16" wheel which im sure limits me to some extent. Can anyone recommend a good looking, aggressive tire that still does fairly well on the street and will work with a leveling kit only? I searched the forums and didn't come up with a good 16" answer...

Also, being a bit of a rookie, what is the difference between load rating D and E?

Thanks for the help