K mount killing me softly:
Not a problem. Roughly speaking, as soon as you've got more than 2 or 3 lenses, the cost of lenses out-weight the cost of one camera body. Buy the lenses of your choice, then buy a camera body to mount on the lenses. If you are clear about why you want to use the lenses (LBA aside), you can invest in more than one mount and that does not necessarily cost more than when you upgrade a camera body from the same brand. There's still something that can bother you: switch back and forth through completely different menus and camera features from brand A to brand B.
In my case, I separate usage in two cases: all around camera system, and wildlife/sport dedicated system. For wildlife, I'd still have an interest with a fast APSC camera, the K-3 would do it, but I would get the k mount DA560 long lens (which I think is a 400 f4 with a x1.4 TC optics on it, so too expensive for what it really is). For instance it would be a 500 f4 mounted on a 7DII or D500, I could benefit from the crop factor and speed of the lens aperture and AF. For the all around system, I could sell all of my apsc Pentax system and upgrade to a Pentax FF, although I don't know yet what the specification might be , and I could still consider a FF mirroless for the small size and the fact that I know I don't need a fast AF for lanscape/archi/portraiture, but I could benefit from the better IQ of the sensor and portability.
In the optimistic case that Ricoh will continue to support and develop Pentax, they certainly are and are going to provide high quality lenses to cover most use cases from wide angle to tele, but not likely anything supertele for a long time. As a photog, that should cover all your needs, but obviously would not fulfill your LBA "wants" but that's another issue (some people end up collecting several dozens of lenses while actually not using them). If you haven't contracted the LBA virus, with three lenses and a Pentax FF + Pentax APSC bodies , you can already cover most use cases.
Last edited by biz-engineer; 02-06-2016 at 04:49 AM.