Should I go for a standard barb with clip locks or a compression fitting?
e.g.
http://www.overclockers.co.uk/showproduct.php?prodid=WC-012-FO&groupid=701&catid=193&subcat=1049&name=TFC%20Compression%20Fitting%20G1/4"%20Thread%203/8"%20ID/1/2"%20OD%20-%20High%20Flow
e.g.
http://www.overclockers.co.uk/showproduct.php?prodid=WC-012-FO&groupid=701&catid=193&subcat=1049&name=TFC%20Compression%20Fitting%20G1/4"%20Thread%203/8"%20ID/1/2"%20OD%20-%20High%20Flow