D N , Jan 30, 2007; 12:48 p.m.
Neither of those cameras are overly heavy, but you do not specify the lenses you would be using. You photos posted here do not suggest long focal length lenses, though. I am particularly fond of ball heads for their ease of use and of Arca-Swiss style quick release systems for the same reason. There have been many, many threads here at photo.net regarding tripods. You might want to search through them and read up on your options. Manfrotto does make some excellent tripods. Their website can show them to you. www.AKAJohnDoe.com