I bought mine as a poor-man summilux.
but I was underestimating this marvel.
It is a beautiful lens!
The only things that would refrain me from keeping only it is its ergonomics (nothing really problematic, not on par with leica, that's all) and its minimum focus at 1m (this one is often a problem to me)
Other than that, and given I need f/1.4 very seldom, the 200+ $ I put on this lens maybe the best investment I ever did...
As a matter of fact I am more and more loving canon lenses for their high image quality, fairly good build and low price. I just bought a 85 and 135.
For these FL or apertures (I have the 35 f/1.5) I only need once in a while, I can't invest in Leica real estate and canon lens offer a fantastic substitute.
OTOH, the wider you go, the more I feel the min focus is a limitation (for one, I wouldn't buy a canon 28 or 25).
Just my two long cents...