Wyeast 2124 (Bohemian Lager), WLP 830 (German Lager), and Imperial L13 Global are supposedly all the Weihenstephan 34/70 strain.
FWIW, I don't get an aftertaste with W34/70 and a number of commercial brewers claim to use it. Fermentis S-189 has been a solid performer for me but while lots of...