I have to say that IQ wise, there's little difference between the 50 1.2L and 50 1.4. The bokeh is slightly better but the build quality is significantly better on the L. Thats one of the reason I only buy L lenses.
I agree, I've had all the lenses mentioned, and while the the 85L II and 50L are amazing lenses their cheaper counterparts are very very solid lenses (especially for the money). But it's $800 worth of lenses vs $3500.
As for the OP, I think it just depends on what you do more. If you shoot a lot of portraits, I would go 85L/50 1.4, but if not I would definitely go 50L/85 1.8. My 85L sits on the shelf a little more than I'd like, but I can't bring myself to get rid of it, it's unbelievably sharp even wide open. But I use my 50L more than all my other lenses I'd say, it's super versatile and a lot of fun.