[Leica] Fast 35mm that isn't a Summilux ASPH

[boulanger.croissant at gmail.com (Peter Klein)]

I'd like to find a fast 35mm lens that does not focus shift appreciably, 
and doesn't weigh a ton.

I have the first (non FLE) version 35/1.4 Summilux ASPH. Because of the 
focus shift issue, at f/2.8-5.6 the point of focus is a bit behind what 
the rangefinder indicates. Yes, I can compensate, but I'd rather not 
have to worry about it. So I mostly shoot it at f/1.4, f/2, and f/8. And 
unless I know I'm going to be in "available darkness" mode, I leave the 
'Lux at home, and take my Mandler-era 35 Summicron IV.

Honestly, though, I love how that pre-FLE Summilux draws. When I nail 
the focus, it's astounding. And even if I don't quite, it's beautiful.
<http://gallery.leica-users.org/v/pklein/album170/L1006956.jpg.html>
<http://gallery.leica-users.org/v/pklein/album170/L1006950.jpg.html>
(M8 photos from 2010 with the 'Lux wide open or nearly so.)

So I'm not inclined to replace it with the FLE version, especially at 
today's prices. What I might want to do is pick up a fast but lighter 
35mm lens. Something that I could use as an all-around lens for travel, 
or when I want a light kit and I might need faster than f/2, but I might 
not. Any suggestions for a lens like this? I must say the recent 
Voigtlander 35/1.5 looks tempting. (I'm not interested in the "classic" 
lenses patterned after the old spherical Summilux.

Thanks!
--Peter