An, I've got to agree with Greg about Hobgoblin in Manchester. The staff there, especially Ken in the acoustic section, were more than helpful. I would also suggest Frailers in Runcorn for all types of acoustic guitar, ranging from budget up to 1930's Gibson's and Nationals in the £1K price range. Both shops let you play all on display (as long as you ask) - no pressure for a sale.

Where abouts in the north west are you ? I don't suppose you're anywhere near Wigan ?