Replying to Question about cameras and lenses

What are the main differences between a sony digital 8 handycam (DCR-TRV350) and a $400 sony miniDV (DCR-HC21)?

I'll be using it at the mountian, and want to know if it is worth the upgrade. The D8 has a USB and DV ports as well.

Also, i'd like to get a wide angle and/or fish eye lense(s) to use, what do you recomend?

thanks Nick