I agree with Ed.  It sounds

I agree with Ed.  It sounds like you have a lot already, at least enough to make a fairly good quality video now.  Go ahead and start shooting your videos, and you will come to realize whether or not you need anything else.  Since you might be moving around in the studio, you might consider getting a Glidecam handheld stabilizer to get those super smooth handheld shots while you're moving around.