Everyone hated the k1, but I still have fun with mine. It's a little bigger than other mirrorless cameras, but it does have shake reduction, and you can snap on any K mount lens, no adapter no nothing. I feel like you guys were a little hard on it, haha. At its current price point, it's a steal.
I'm having a great time with my k3, totally agree that it's a phenom for a APS-C, and am completely with you all on building the ff lens lineup, but there are plenty of FA lenses around.
Check em. I have the 28, the 35 and the 50 1.4. They work perfectly on the K3; maybe a few brand new lenses too, but Pentax could just update a few of those FAs to fill things out.