EDIT - I didn't realize you were in the UK when I posted this. I always forget that there are a lot of people from outside this country on this forum. The prices and retailers listed below are assuming a US owner. You should still be able to get these brands however.
I have never actually been a big fan of KYB shocks. Used to sell them and had a lot of problems with them. Others like them but me not so much. Many other brands I would prefer over KYB. I would probably take KYB over the OE product but not over other aftermarket brands I prefer( when available ).
There are a couple other available options for you. Just note they will be for 2007-2010 models only. It appears in 2011+ the shocks changed and no aftermarket company( including KYB )has anything yet that I could find anyway...???
I.
MONROE: Monroe offers them in their Sensa-Trac line. The Sensa-Trac shocks/struts are a pretty good product. At least for on road use. Not really designed to be an off road shock/strut but would definitely be an upgrade over the OE struts. Of the ones I have found available, if I needed struts for an 07-10, these would be what I would go with.
Front Left = 72368
Front Right = 72367
Rear(2) = 72401
* NOTE - You can use these numbers at Napa too as their shocks are actually relabeled Monroe and use the same part#
Mfg's info on shock/strut line...
http://www.monroe.com/products/Sensa-Trac
Rockauto stocks them for the best prices I have seen. A full set of fronts and rears, with shipping, should set you back less than $255.00( was $253.12 to my zip to check ). If you have a coupon code all the better.
5% Off Code for Rockauto = 1288608810530767( I think this is good? )
II. GABRIEL: Gabriel offers them in their Ultra line. This is a decent shock/strut brand if you use one of their better lines( their cheap ones are really cheap ). The Ultra line is one of their best lines. As with the Monroe's above I would not call these an off road type of shock but rather an upgrade over the OE ones for on road use. I would take these as a 2nd option before KYB but that is just me.
Front Left = G52081
Front Right = G52082
Rear(2) = G51842
Mfg's info on shock/strut line...
http://gabriel.com/our-products/car-light-truck-van/ultra/
AutoZone among other parts stores sells them. I doubt you can beat the Rockauto price on the Monroe's however. Would be over $300 for the Gabriel's at AZ.
Hope this helps.