William, I am very interested in your question.
Did they re-release a remastered Joshua Tree? Because I thought the original CD sounded absolutely awful.
MarkSJohnson has given the link for the reissue. I have the 1987 Island Records copy. I had not heard this album but saw it on the Bio channel and was taken by the "The tune creeps in - building, building, building - then it bursts out of the speakers with this stunning chiming trailblazing guitar work and Bono's impassioned growl and lyrics" as one reviewer put it. I like it. I am going back to vinyl and bought the 180gm LP to compare-not done it yet.
Reissue link with reviews.
http://www.amazon.co.uk/Joshua-Tree-Ltd-Reissue-U2/dp/B000ECY2YO
