I just got my M9 on Monday and, as a novice to both rangefinders and Leica, well what can I say? You're all extremely fortunate!
My lens choice was mostly influenced by the opinion of Steve Huff and Ken Rockwell. So I went for a used 35mm Cron and a new 50 Lux. But I'm surprised now many advise against this on this forum, preferring a 28 alongside a 50 (not that I see anything wrong in this). Me, I'm enjoying the combo immensely: 35 just feels "right" and it's scope allows you to tell a story or convey intimacy - It feels like you're placing the viewer in your shoes. Yes the fifty's focal length is not so different, but IMO it feels completely diverse, as though it's more detached, producing contemplative studies rather than documenting events. In this respect the low-light ability is perfect on the Lux as it allows for those candle lit portraits than merit prolonged scrutiny. I know it's not wise to generalize but this is how I'm using these lenses.
I think this is all the glass I'll ever need. Anyone else had the same experience? ... or disagree completely!