Should I buy a Ps3 for Mlb the Show?

Sometimes I really wanna get something, about a year ago I bought a 360. I will still play it, but Mlb the show 09 looks so good and 2k9 is starting to be bothersome. I really like COD and the only 360 exclusive i like would be GOW. Is it worth it for me to buy a ps3. And i also might win about $800 or more soon which I could use.