[Emashu]

I don't illustrate myself but if my knowledge helps ya then
SAI is pretty awesome and is used by most of the population of illustrators

[friesyummy05]

Photoshop will be good, many artist/art students use this program, but professional concept artist use corel painter.

[Volture]

Originally Posted by friesyummy05

Photoshop will be good, many artist/art students use this program, but SOME professional concept artist use corel painter.

Fixed that for you. There are just as many concept artists that use Photoshop as concept artists that use Corel Painter, which I'd say there are more who use Photoshop, but that's something I can never prove.

[Denai]

I read from a manga that she uses Corel Painter and most of the artist I see in youtube uses Painter. so i think you should use COREl painter