A few PS3 Questions

[wenxia]

Well i'm sick of Xbox and Microshit so I'm getting a PS3 but I have a few questions.

1. One of my friends told me you can only have one account, like PSN thing or whatever. That true?
2. For games that have cheats but disable achievments on 360, do they disable trophies on PS3?
3. Is it still worth it buying a Ps3 even though my TV is only 720?
4. I heard some games only play on 1080i or something any truth to that?

That's all thanks to whoever helps.


















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