Can anyone recommend a reverse camera to go with my pioneer avh 3100dvd - I have been recommended this 1 by another member

http://cgi.ebay.co.uk/OPEL-Vectra-As...item2c55062fba

But after doing a search and seeing a small round one fitted in the rear bumper above the number plate i took another look and found this 1

http://cgi.ebay.co.uk/3-6mm-Wide-Ang...item20b160cec4

Has anyone fitted one of these, also has anyone bought from hong kong - will i get any hassle from import tax etc?