The 50L sucks, I'd never buy it. The focus shift kills this lens. I don't know how any shots in the sample shots thread were made. I think the owners simply got lucky.
The 85L is awesome! Even if it was the wrong focal length, I'd use it just because of the bokeh and 3D-ness of the results. And because everyone else says it's the best.
Ok, in all seriousness, when I found out that the 35-85 combo wasn't for me, I sold and went for the 24-50. (135L turned into a 70-200). I'm MUCH more happy now because I can compose shots with focal lengths that are comfortable for me. And it sounds like that's the bind you are in now: you have lenses that while great just aren't jiving with your creative eye. Don't listen to the hype here, do what you need to do to get the shots YOU want. The 85L is stunning, but stunning falls far short of usefulness when it's time to get that shot.
I'd sell the 35 and 85, get a 50mm of some sort, and that's it, done. You mentioned that you've got the wide end covered, and that now all you need is your normal/walk around prime. BOOM, you just pocketed $$$ from selling the 35L and you are shooting at your preferred focal length. Check out the Sigma 50, and you just saved even more $$$.