Adobe Illustrator.
Or Corel Draw.
That's the point of both of them, mostly.
I don't know if Rina still goes on here (Apple, Pinkly... I dunno what her name was before that. I know she had one though.) but if she does, talk to her. She's done a couple of people and stuff on Illustrator.
If you want her deviant art its...
pinkly.deviantart.comGood luck with it. I've never had much luck with Illustrator and I've been out of the graphics loop for so long, so I wouldn't know about anything new and improved.
Hope that helped.