Both or which or if any of these video games are you getting?

I had the NBA Live series since 2004-2007 but I think 2k8 should be good too, can anyone give me advice on which is better. I played 2k7 and it was more realistic then NBA live 07, I liked it more on the playing touch too. I got the 360 which of these games you recommend, and which are you getting?