Thanks for the advice,The dealer's first option to me was to have a Hyper spring fitted with a progressive spring£170(may be wrong with the name) my problem with this was it wasn't the spring that was the problem but the pre-load.I asked about servicing the original shock but was told these are sealed units and wasn't a option,2nd option was a maxton shock 3rd was wilbur.I went for wilbur as of what I've been reading here(seems like a popular choice)I've told them to order the wilbur now so kind of committed to it but will check with rev's price to make sure i'm not paying lions share.I know i could take the bike back and demand money back but do like the bike and the way i was looking at it was £250 for a better than standard shock and fitted might be the way to go.
O Tam! had'st thou but been sae wise,
As ta'en this forum's advice.......

I'm curious as to which dealer you bought this from....?