So I already own a 12-24 and 105VR. I recently sold some primes and an 18-200 VR and am now looking to replace them. I love to shoot wide and often keep my 12-24 glued to my camera, my style of shooting is mostly landscape where I have time to setup, or candids while on vacation. Lately I've been wanting to focus more on portraiture. I'm looking for something to fill the mid range or something that acts as a general lens. So given what I have in my current bag, what lens would you purchase? The obvious choices are the 17-55 and 24-70. So given what I already own, what would you go with?