What lenses should I buy?

When upgrading to the 5D Mark II some of my EF-S lenses had to follow my old 400D (EF-S won’t work on the full frame 5D). So I need to buy some new lenses to cover my needs. But I can’t decide. This is what I currently own:

What I've got

Canon 70-200 f4L IS
Canon 50 mm f1.4 USM
Canon 15 mm f2.8 fisheye

And after posting the following question on Twitter:

If you could choose three Canon lenses. Regardless of price. What would you choose?

Here are the results so far:

lenses001

Seems like the 70-200 f2.8L IS is a favorite. I already have the f4L version of that lens. Mostly because it’s half the weight and half the size of the f2.8L. I like to travel light. And the f4L is razor sharp and very high quality. Here’s a set of favorites shot with that lens. So I’ll keep that one. The next is the fantastic 85 mm 1.2L. Is it worth the weight and the price? Anyone out there owning one?

Still the problem is that I don’t know if I want to go for a zoom or some primes. I need something wide that’s not as extreme as the 15mm. And probably something for portraits that is faster and hopefully smaller than the 70-200 f4L IS. A couple of alternatives:

1. Convenience:
The 24-70 f2.8L

2. Pure quality and speed:
24mm f1.4L II + 85mm f1.2L

3. Travel light + reasonable quality:
28mm f1.8 USM + 85mm f1.8 USM

I’m also considering the legendary 135 mm f2L when I need more speed than the 70-200 f4L can give me. Or how about the very versatile and razor sharp 100mm f2.8 Macro?

What do you think? I need some advice. And at this point I don’t want to spoil the party by talking price. I want advice on the best solution. Your favorites. Regardless of price. Links to reviews. Etc…

Update:
I’m carrying my camera in my bag more or less every day. I shoot lots of stuff in natural and low light. Don’t like using a flash. Currently I use the 50 mm 1.4 a lot because of the combination of speed and light weight.

What lenses should I buy?