Sell my 15-85mm and 50 1.8 for sigma 85 f1.4?

I'm juggling the idea of getting rid of my 15-85mm and buying a sigma 85mm f1.4. I use my 10-22mm and my 70-200 a lot, but I only really use my walkabout either at abot 30-35 or 85mm. What do you guys think?

Iv heard really good thinks about the 85 and already love the 30mm

I could see a 50/1.4 and an 85/1.4.

Sure, it is a great idea if you like primes and want to complete your prime setup. But it will leave you no general purpose zoom.