Im looking at either the:

Bogen Monopod 680 Compact Chrome BLACK (to go with my nikon):
http://www.ritzcamera.com/product/29...s%3Bcimonopods

or

Bogen Monopod 681 Professional
http://www.ritzcamera.com/product/29...s%3Bcimonopods

I also need a head for a monopod right?

http://www.ritzcamera.com/product/29...s%3Bcimonopods