Starboard Driger, That's pretty cool, but I think it'll be really long before they release a SD Dynames or even MG Dynames though.
I'm not too sure about brands, I use Hobbymate, a hobby supply brand which my local hobby store stocks extensively but I think the brand doesn't matter. There are other kinds of scribers that are not pens, although I don't know how easy they would be to use. Also, you should get some high-grit sandpaper if you're scribing, to sand away to excess. You're free to ask me if you have any questions about modelling, although my knowledge is still pretty limited haha.