What are the pros and cons of HD Vs MiniDV?

I have had a Mini DV Sony camcorder that has developed some issue with the casette mechanism.
I am contemplating on whether I should go in for a MinDV or an HD video camera.
What are the pros and cons for each?
If I go for HD, how will I ever be able to view the DV tapes that I have recorded stuff with in the past?

Technorati Tags: Best Mini DV Camcorder