Which MLB game should I get?

I've heard 2K9 is good, but I don't know if it recieves roster updates, I like games with intricate "my player"-esque and franchise mode, I'd buy MLB the show, but only if it is amazing, I prefer 2K games. Not buying "The Bigs". If you can, give me a new/pre-owned price, as I'd like to purchase used. Thank you for your time