you're so right. ! illustrator + photoshop are awesome and so very good combo. and more: if you work in Mac you don't have to worry about anything. if you use illustrator + photoshop and take some effects by corel then you use all the sources getting more chances and posibilities but.... I use only Corel Draw, Corel Photopaint.
My Girlfriend loves photoshop, once she told me about a tutorial and I tried it, I found it so easy but I dislike PhosoSp. Before I got my macMini (I use Dell + Win vista) I almost swear: "When I have my Mac I will learn fotoshop". I give up... no thanks... everything starts when I dislike the Photosh.