Three of the cameras are point-and-shoot.
The Sony V1 is an intermediate camera with manual over-ride controls. If you want to get more involved with photography, the V1 would be the right choice.

You should check on what owners think about the cameras.

The link will show you a side-by-side comparison of the features. Just under the red stars you will find
"Read owners opinions".
Click that and read all the comments by owners.

http://www.dpreview.com/reviews/compare_post.asp?method=sidebyside&cameras=casio_exz40%2Cpentax_optios4i%2Csony_dscv1%2Csony_dscw1&show=all

...