Replying to FX7 vs. FX1 vs. DVX

So I THINK I've narrowed it down to these cameras. Money is a big issue so the cheaper the better, but if im spending this much money I want it to last for a while before I think I need something better. First off, I heard that FX7 have better quality then DVX but you sacrifice alot of things for that. Also, if someone could help me with the differences between the FX7 and FX1. I know the FX7 is newer but people still like the FX1. Also, if anyone has any other suggestions for cameras I am open to that. Thanks.