My non-negotiable camera is the the Monochrom (at least 99% of my images are black and white). And a 50mm is usually glued to it. My old f/1 Noctilux is my favourite 50mm but, for travel, it's heavy and only close focuses to 1m. My 50mm pre-asph Summilux is what I've been travelling with, but it's brass BP and weighs tonne. That wears on you... I've been looking for a 50mm light-weight travel lens that focuses close and I'm afraid I'm quite smitten. Me, who prefers Mandler lenses over the newer designs.
As for the other, I happen to have an affinity for 28mm as well -- but don't love it on a rangefinder because you can't get close enough (at least for me). The Q does. The fact that it allows me colour for the 1% I might want it is a bonus. 28mm, to me, is personal and I like the option to have colour, auto-focus, live-view and all those things I usually don't use for that. It's a lovely break from rangefinder shooting, but even lovelier that I can zone focus easily if that's my preference. The fact that it weighs a less than my M9 with a 28 Cron is another plus.
I travel a *lot* and weight is important to me. But so is the look of the lens, and I find both the 50 APO and the 28/1.7 to be beautiful neutrals. They don't have the character of my older lenses but they also don't have the digital harshness of some smaller, slower lenses.
It's all my personal opinion but, to me, photography at it's best is personal.
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Except I'm a she :ROTFL:
Glad you understand though, G. xxxx