I have a D7100 which 99% of the time use my 18-200mm VR glass. I also have both the 35 and 50mm 1.8 primes which rarely, if ever, get used. I've noticed that most of what I shoot falls within the 24-100 range, so I was thinking of dumping all my DX glass and stepping up to the Sigma 24-70 2.8. I can't afford the Nikon equivalent and this lens gets decent reviews. Thoughts? Suggestions?