i dont't think the nb cares if its wide neck or the std bottles.. i've used nuk for my first child.. we switched from the std bottles to the wide neck ones because (1) its much more convenient to scoop and put the milk powder in (2) they got cuter prints :P (3) and they've got BPA free bottles for the wide neck ones.
i chose silicon teats because i can't stand latex smell. plus its recommended to change the teats monthly. so it doesn't make a difference if it's latex or silicon.
you can find nuk products easily at all kiddy palaces and dept stores.. even some baby warehouse carry them.