Brake advice please?

[daz bmx it!]

I have an old to mid school age cruiser which has canti mounts (think thats right?) and a caliper mount,which would be the best type of brake to fit? only need a rear brake but would like to be able to stop

[pickle]

Cantis will work much better Daz 

[daz bmx it!]

i thought that,dont really like them,but which one should I fit?

[pickle]

any of them

http://cgi.ebay.co.uk/CANTI-LEVER-BRAKE-ALLOY-FRONT-REAR_W0QQitemZ220567754235QQcmdZViewItemQQptZUK_sportsleisure_cycling_bikeparts_SR?hash=item335adcd5fb

[pickle]

these look a bit nicer

http://cgi.ebay.co.uk/Retro-mountain-bike-cantilever-brakes_W0QQitemZ120554373142QQcmdZViewItemQQptZUK_sportsleisure_cycling_bikeparts_SR?hash=item1c1199c016

[priv]

how about a hope disc brake??