I have an SC-28 which I use on a Stroboframe flash bracket. Works very well. Of course the 910 can be set as commander, but if you have no other flashes, it is a moot point. You could also get an SU-800 Commander. I have one and it works great for indoor studio work. You can control up to 3 groups of flashes remotely using CLS.
So the 3200's popup flash can't be set to commander? I'm rather surprised, but then I know nothing about that camera.