It's been a while since I've asked any "What should I buy?" questions, so please forgive me. First, for reference I mainly shoot landscapes, city scenes, candids and portraits.
I was thinking of dropping my current kit down to two lenses. I now have the Tamron 17-50 and 30mm f1.4 on the wide end. I'm finding I use the Tamron more than the Sigma so I was thinking of trading the Tamron and Sigma for a 17-50mm OS HSM from Sigma.
On the longer end, my go to portrait lens is the Tokina 50-135mm f2.8. I just picked up a 70-210 USM for kids sports and I am SHOCKED at how fast the USM is compared to my Tokina. I kinda want that kind of AF in my key portrait lens, too. I also have a 55-250 kicking around that I never use. So I was thinking of consolidating all three into the Sigma 50-150mm OS HSM.
So I'd end up with just the 17-50 and 50-150mm f2.8 OS HSM lenses from Sigma. I'd lose the f1.4 prime and the 250mm reach. But I would gain stabilization and faster AF as well as trimming down the kit to just two lenses.
Any thoughts? My only worry is that the 50-150 looks like a monster.

