Should I get GTA IV or iOS GTAs?

I have twenty dollars to spend, should I get GTA IV for the xbox 360 or a 20 dollar iTunes gift card and get GTA III and GTA Vice City for iPhone (I already have Chinatown Wars). Please don't answer based on the PS2 version of those games but the iOS versions. Don't suggest GTA V, because I already have it.

Added (1). Ignore the "full game download link" I don't know why that's there.

Gta 4 since gaming is better on the xbox 360 than a tiny phone.
or put that towards some of the new games coming out.

Gta 4

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