Originally posted by bobbyscon @FozzFoster - It sounds like you'd definitely recommend the KP or K-3ii over the K-70, correct? I agree with the lens assessment, but I think I would rather invest a bit more in the body and get one that meets more needs and will potentially be useful longer. To rephrase, are the features/benefits of the KP or K-3ii worth $200-ish over the K-70?
Definitely. I've have the KP for more than a couple of years now. In addition, I have the very small but nice K-S2 bought new after the K-70 came, which is built and designed very like the K-70, although the K-70 is slightly larger. I then gave away my still nice K-r to friends. I also continue with my former flagship K-5 IIs, built much like the subsequent K-3. My KP is now my most used body, by far.
Your statements show you are very much interested in durability and reliability as well as improved performance. There is no comparison in these factors between a K-70 or K-S2 compared against a KP or a K-3. The price of a new KP is now at bargain level for what it is. I just checked B&H (if you are in the US) where I bought mine, and at $747- an outstanding price for a camera in this class. I've seen similar from them before, but then the price went back up some. They guarantee the price will not go lower for some period, as I recall, or they will refund the difference. You can even get a package with useful items thrown in for free. I got mine in silver, and it is a beauty! Looks great with black or with silver lenses. Metal construction (magnesium alloy, strong and lightweight) and controls designed far above the K-70 style. The "silver" version of the K-70 is too dark and does not match the silver lenses. Don't get me wrong, the K-70 (or the previous K-S2) both are outstanding for an entry-level DSLR. But the KP is in another class, and YES worth a couple hundred more $$. Coming from your K-r, it will mean improvements measured in miles not inches. Controls, construction, durability, reliability, image quality, features, and useful versatility. The KP can outperform the K-3 in low light-higher ISO situations, for all-around great imaging. And you'd have a new vs. used camera.
As to lenses, for now, your DA 35mm f/2.4, can provide very sharp results and has a versatile angle of view for all-around use. Your Pentax AF 50mm 1.4 is a very capable lens (great for portraits), as is your fine Sigma 50mm macro. Your DA 50-200mm can be quite good, especially at certain apertures and zoom settings. Take your time going forward as to which will be your next new lens choice to expand your focal length range. There are numerous options depending on your particular needs, that will definitely be better than your former 18-55mm kit lens.
Some of the deals bundling lenses with the KP might not be deals at all, comparing the prices of the individual items.
If you like the convenience of excellent JPEG results right out of the camera, just be sure to set "Fine Sharpening" in the Custom Image menus, especially in the most often-used "Bright" category, accessed via the "info" button. The KP's in-camera image processor is exceptional. Stay away from having the mode dial on the green "Auto" setting, as that disables many controls and adjustments. Use the "P" mode instead if you want fully automatic exposure operation.
And welcome to the forum!