Been saving up, sold some things, and now looking for the next addition for the Pentax K3ii, somewhere south of $1k hopefully. Looking more toward portrait work, and general use. Currently have the kit 18-55 f/3.5/5.6, a 50-200 f/4.5-5.6, and prime 35 f/2.8 Ltd, 50 f/1.8 Ltd, and 70 f/2.8 Ltd. The primes serve me well for most portrait applications but I find myself longing for the flexibility of the zoom that the 18-55 offers. I'm leaning toward replacing the kit 18-55 with something that offers better optics, faster speed and more range. Any suggestions?