What David Skaggs said. It all depends on what you're doing it for.
Full disclosure: I know almost nothing about the technology. But I've worked with film makers, and there seems to be consensus that it's less about the equipment, and more about other stuff; lighting, background, etc. When we filmed "
Dumbass Shakedown", my director used a mid-range camera, but his biggest grip was about the fluorescent lighting and plain white walls.
My suggestion... use what you have, and see for yourself how it turns out. And find a friend who's got some technical knowledge to help & guide you through.