I just checked prices at B&H. You can get a lot for the money. Right now the K-S2, which has a base body price of $500 is selling for $536 with the little compact kit lens in black. Even though you have the former kit lens, this one offers weather sealing (WR) like the camera body does also. The lens separately cost about $300, but this way you get it for $36! When retracted for carrying, which is a bit fiddly to get used to but I've found no big deal, is the smallest APS-C zoom lens on the market.
If you have more to spend, and especially if you shoot a lot of RAW files, the K-70 is the best way to go. The base body price is $600. You can get it with the DA 18-135mm lens, which is a much better lens than the one you have, also with WR and a great build quality, for $870. This means you get a lens that normally costs $477 for $270! You don't get WR in lenses and camera bodies at anywhere near these prices with other brands. With them, WR comes at around $1,000+ for the camera, and around $1,000+ for the lens.
When you get your new camera, I always recommend the same as dpreview's testing does- add "fine" to the sharpness settings in the custom image menu for both the "Bright" and "Natural" categories.
Last edited by mikesbike; 06-08-2017 at 09:24 AM.