I've never used them, but they are said to be one of the best and RIDE usually has them in the UK top 5. Friends say they are excellent.
If it's service you want in Wales, you'll not do better than Mike in Cardiff Motorad - but I am not sure if his work would conitnue a warranty on a new bike.
I'd have no hesitation in going to see BVM and if I liked what I saw, would buy from them.
BVM are excellent - got my 1150GSA from them even though Cardiff BMW were (at the time) far closer - servicing is excellent and they are great people, I'll be going back for my next bike
For what it's worth I don't think you'll regret ordering from BVM.
I have had a few dealings with them and have found their level of service superb. (and I didnt buy my bike from them - but as you'll know we no longer have a dealer here in Cardiff!)
Indeed, to put my money where my mouth is, I too am planning to order a 2008 GSA from them.
just took the plunge yesterday ,took your advice and got a good deal .panniers f.o.c. !!!!!! only thing now is do i put an alarm on it ? delivery date mid march so far.