Welcome to the forum,
RaZZ3R!
Kodak went down, and nobody expected it to happen, not back in early 2000's when they released the first full-frame DSLR. Like somebody earlier said, no company is future-proof... maybe, future-resistant?
Anyway, I have to say that the K-5 and K-30 are now at their best price points - both absolutely amazing cameras. While they may not be as inexpensive as the K-x and K-r, the extra money you'll shell out for them is going to be worth it. Like you, I'm on the upgrade path- but not looking at Canikon. Not because I want to stay loyal to Pentax, but because my current glass is doing what I want them to do for me.
It's great that you know what kind of photography you'd be mostly doing in the future. And although the lens selection
is a little limited for Pentax, especially in the extreme ends - well, it's not like one will buy a great lens every time a new one comes out right? The Sigma 8-16 will fit almost everything into an APS-C frame. The Samyang 10mm also. The DA 12-24 is a good option also. For the long end, there are lots of options from the third-party makers, some may be discontinued and available only second-hand, but again, it's not like you're going to buy a 100-300/250-600 every other year, right? So keep cool with the gear-buying decisions, and let your
needswallet decide
If you do want to shoot lots of moving stuff, Canon's AF will certainly please you. But here's the thing: even if you go Pentax now, you can always shift later. Think about the time you're losing in the present thinking about what gear to buy in the future and not having the one you can shoot with now... so if you have the dough for the K-5, and if it's still your dream cam, get it while you can
Anyway the DA 560 will prove itself once it's out, I believe.