Actually, this album isn't on Naxos, but as a powerhouse collaboration between eminent pianists Alfred Brendel and Walter Klien, this recording of Mozart's two piano works is simply too worthwhile to leave out. Brendel and Klein's rendition of the Sonata for Two Pianos is perfectly balanced — kind, vivacious and generous. As if their playing weren't pleasurable enough already, the recording offers additional amusement; its stereo channels separate the two pianos across space, underscoring Mozart's playful alternation between dialogue and synchrony.