I know this quote is regarding the two 50's in question, but how does that "amazing bokeh" compare to the performance of the 35L? For a hobbyist, I've been lucky enough to spend money on equipment, but can only justify spending for one quality fast prime. Been debating quite a while between the two and looking at images I've gotten at either focal length I realize the photos I like the framing of could have been taken with either with a slight change of background. At the moment I have the opportunity to get a 50L for about $1200 (excellent condition).
I use a 7D with a 10-22, 24-105L, 70-200 2.8 IS II, 2X III. I don't have a specific intension for the lens, just want one lens to give me the ability to shoot creamy photos, shots by the fire, candle light, etc. I love long exposure night shots, which I do with what I already have, but would love the ability to capture reasonable walk around night shots. The 35L might have the edge on that last use on a 7D, as well as in smaller rooms if trying to get a full body shot, but I'm wondering if a good opportunity should bias the decision. Especially since I have not really been able to decide over the last months anyway.