For what things do you want to use your Mac?
That's more important than you think to decide what MBP you gonna get.
I don't know if the above poster was serious or just fed up about all those threads asking what MBP to get without proper research or more clarification on one's needs, but the 15" model with a discrete graphics card could be too much for your needs.
So what are your needs?
Are you using the computer to compose music, or writing sheets of notes, or just gaming, or writing essays, or watching porn, or listening to classical music, or.....?