Here is what I think is the best Dragonball Z sites

Dragonball Z.com
Vegettos and Gogetas DBZ Zone
BeCoolBoy'Z Dragonball Page
Dougs Dragonball Z page
Ashoks Dragonball Z page
Jackwei'z Dragonball Z Page
The New Saiyan Home World
Dragon J's Dragonball Realm
SonGoku's Dragonball Z Page
Planet Namek.com