The K-70 is an amazing machine at its price point. You can pay a whole lot more for far less camera. That said, be sure it fits your needs: Are you outdoors a lot? Do you like landscapes, cityscapes, daily life, natural life, and generally recording the world around you? If so, the K-70 is for you. The major thing it is not specialized for is high speed, action photography and even there you can do OK. I have recorded gannets diving at 100kph (65mph) and ospreys going a bit slower just fine, for example. Also video is fairly vanilla and fine mostly only for basic personal use.
Important point: Use the money you save to get really good glass. Depending on your preferences this would mean (for zooms) lenses like the Pentax DA 20-40, DA 16-85, DA 55-300 (PLM version) rather than the normally provided kit lenses. If weather resistance is not required there are less expensive versions of these from Sigma and Tamron, but again, don't skimp.
Taken from a moving sailboat w/ 55-300 PLM and K-70
Very hastily taken shot as a minke suddenly decided to examine my boat from ~10 feet underwater with 55-300 telephoto. No time for setup at all, still very satisfying to me.
Landscape 16-85mm
Capelin haul 40mm Ltd
(In all cases the full res versions are much superior, but this board reduces files to 1280x1000 max.)
It's very hard to go wrong w/ a K-70 and good glass if your desire is to get a good DSLR for personal use in my opinion.