Light painting tool - progress update

Last post I showed a couple circuit boards for a light painting tool I'm building. I planned on getting it finished by last week, but spring time house projects intervened and I didn't get as much done as I had hoped. However, I did get the user controls assembled. The three controls will adjust the red, green and blue sections of the LEDs. There are two ways to program it: either as RGB sliders or HSV sliders. I'm undecided which will work best, so I'll probably try both ways and see which I like better. Any thoughts on which way to go?