The Fostex speakers I'm listening to with the Antique Electronics amp are FE 208 Sigmas using Martin King's excellent design, found at http://www.quarter-wave.com/Project03/Project03.html .After reading Martin's writeup of his use of Lowther DX drivers in a similar design (which includes his listening impressions comparing the Fostex and Lowther drivers), http://www.quarter-wave.com/Project04/Project04.html , I'm dying to try the Lowthers, but they're just too #$%& expensive!