Hugh,
If you are coming to Ireland there are a few garages to check on, Sorry I dont have tel numbers.
Merlin Motor City, Long mile road
Alan Dorgan Motors, Monkstown (BMW,Merc)
Aston Cars, Tallaght (BMW,Merc,hi-spec)
Stuarts Garages, Tallaght (main Rover/MG)
Hope this helps and you should get a good deal for STG against Irish punt. If you need any more help e-mail me.