Hi Stuart
First off you don't have to go to a dealer to keep the warranty, i'm having my 30,000 service done at Xtreme Scoobies (they have done all my servicing) in a couple of weeks and they will also stamp your book [Y], if you want to use a dealer on your list (apart from Fox's who are no longer in business) then i think i would choose Barrett's from what i've heard on here.