Replying to Frame Rates

Yeah Ive been on thread creating frenzy of late..

The last few days Ive been looking on the internet to the different types of frame rates. But I cant seem to find a good comparison between the types. Could anyone explain to me the benefits/disadvantages between 24p/30p/60i

I get that 60i and 30p are almost the same thing, but is one better than the other? Also what are the advantages of 24p? It seems to be the new fad, but I just cant see why anyone would want 6 less frames?

Also I have Vx2k right now, and could probably even trade it out for a DVXa, I feel fairly comfortable with my camera, but am planning on getting rid of it in hopes of getting an HD camera. Then I found this the DVX, could anyone give me a good price of what it should be worth, has low hours. Also how lost would I be if I switched cameras.

I know these are noob questions, but Im just trying to learn..