Alright. I thought there had to be a drawback of some kind, or else why would people do complicated hardware mods? Good to know that I'm good. And it really does look good.Yes. The Megadrive outputs RGB natively, there is no need to mess with it if you can exploit it. Mods adding S-video, Component or HDMI (gasp) can reduce the picture quality and should only be considered by people who can't use RGB in any form.
And I recently got my first 6 button pad, which further increased my enjoyment of these games. I wish I knew about this stuff when I was a kid!