I'd buy my rig from a water-cooling specialist rather than a closed-box reseller like OcUK that uses these forums as free support. OcUK will happily sell you the big-ticket items they make a good profit on, but you'll need to go to a specialist for the barbs and if you spend the big money at OcUK the specialists will go bust and then where will you get the spare parts from?
Seriously - for a graphics card or a motherboard, OcUK are fine but for water-cooling you really want a specialist vendor. They'll have a wider range of parts and spares if you need them.
Seriously - for a graphics card or a motherboard, OcUK are fine but for water-cooling you really want a specialist vendor. They'll have a wider range of parts and spares if you need them.