If you want a 35 that performs really well but don't mind the size, Voigtlander make an excellent 35/1.2 that many say is on a par with the first version of the Lux ASPH (and very close to the £3000 second version). They also make a 35/1.4 which is pretty nice too. I got the second version of the 1.2 for £700, brilliant lens. The pre-ASPH Leica 35 is around £1200-1400, it's small but it suffers from coma wide open (aka the Leica 'glow' some people rave about). Best place to get one would be on the Leica user forum or Rangefinder forum.