AYO GOT SOME TIPS FOR YOU SON.
VX1 - Da bes, all 'yo fav filmers' use it (if you have good taste, ya know) and the audio is really something lovely. If you can get your hands on one, albeit with some $ spent on shipping, go for it - but, make sure you query the seller about servicing etc.
So much of the decision process depends on how much money you are willing to spend, and the risks you want to take in terms of much older, but more desired, cameras.
The panasonic DVX100 is another option, century make a lense for it (not cheap), and if you're looking for resale value/using it for other types of film work it's a bit more useful. The DVX also has an 'hour meter', so you can check how long it has been recording for, rather than guesswork with the sony cameras.
From memory, Opteka were making lenses similar to the century ones for the sony series for a while; they weren't the same quality, but they were a fuuuuckload cheaper. Use the search function on skateperception.com, you might have some luck.
I haven't mentioned HD, because:
1.) It sucks
2.) See 1.
And as Tate mentioned, whatever you buy (if you're using tapes, anyway) make sure you use a capture camera. It'll preserve the life of your camera heads and save you heapa cash.
Also, use the same brand of tapes all the time! Different brand=different types of head lubrication (lol),= expensy maintenance.
Gizza PM if you've got any more questions and I'll dream up some semi-accurate answers.