I am interested to buy any of the following car like i10

I am interested to buy any of the following car like i10 magna 1.2 vs i10 sportz 1.2 vs ritz Vxi.
I am really confused which is the best. The difference between magna & sportz is only
30000 rupees . Is it worth buying sportz. The dealer says that if we buy magna he will give sony mp3 player whereas in sportz it is default setup. The system given in i10 sportz is good but without USB/Pen Drive. Pls clarify. Also about ritz i didn't like the rear finish. Very ugly.. But how about the relaiability. If any one have idea suggest me.It would be helpful for me to buy . Give you suggestions. I saw i10 magna and sportz both looks equally good but sportz system looks awesome. The problem is that if you go for sportz model you can't change the player in the future.The interiors are awesome. No one can match to it. But looks like a cute little car. I need to know is it worth buying? This is the first car i am going to buy for my family. So give your inputs.