Well, I rented the 50/1.4 as I said I would.
So my plan is buy the 85/1.8 and make it my first prime. I will carry it along with the 16-35LII and 24-105L.
After doing a few shoots, I will see where my focal lengths are averaging out and then make another decision on a prime. Either I will wait for Canon to release a 50 1.4 USM II this year or maybe go with the Sigma 50/1.4 IF I notice that I am using 50mm frequently. Other primes in consideration are the 35L and 135L but I will need to save a while before getting them.
Great choice! I think the 85 1.8 is more fun than the 50mm length, also. When you're deciding on the next prime take a look at the Sigma 30mm 1.4. I use it much more than I do my 50. Now we'll be waiting for some new shots from you with the 85.