Martin has developed a guitar with Sir George Martin (yeah, that one; the Beatle's producer). It's a beautiful guitar, and a bit pricey, but it was designed to be the ultimate recording guitar and all the features fulfill that mandate. The top is an extremely rare Italian alpine spuce, the sides and back are mahogany, and the guitar is built of an M body. The neck is also mahogany, and is 1 and 3/4" at the nut. Martin is accepting orders for this guitar until Sep23rd.