Ive just been on this website as i need to get a new fuel filter for my 1.9cdti 150 but they range from £3 to £19...which one is best?

Heres the link

http://www.vauxhallworldparts.com/Part-Search/Vauxhall-Part-Search.php?description=fuel+filter&Submit=Search&v ehicle_select=18&esize_select=1.9+Diesel