As far as the Hoyts go the popular cam seems to be the Versa Cam. There are three Diffrent verscams to choose from and you will want to get the one that closely macthes your draw lenght. this the draw length info I got from Hoyt about the versa cams.

http://fattirezone.com/bow/versacaminfo.htm

I didnt get this info before I got my Cybertec but luckly the shop owner was cool and made sure I got the right one.