I've owned my K-7 for the best part of a year now, and have been extremely pleased with it. Many reviews simply don't seem to "get" the camera's USP, which is a great shame.
The K-7 is about rugged, outdoors, all-weather photography, giving an impressive feature set in a durable but compact body. It's the perfect travel or landscape photographer's camera, incredibly intuitive but best-suited to photographers who like to fiddle and fine tune, rather than people who expect to get the best results at default settings right out of the box. Buy it with the WR kit lens simply to make sure that you have a system that is perfectly designed to cope with the British weather! And that lens is no slouch either: much better build than many other "kit" offerings, and a decent performer too, especially once you move past the widest angles and widest aperture.
This is a discrete camera in more ways than one. The quiet shutter can certainly be a bonus. And it's compact size - especially when coupled with some of the great Pentax primes that it was surely designed for - make you much less noticeable and threatening to the people around you. It's nowhere near as "in your face" as the enthusiast level Canon and Nikon offerings, and for some of us, that is probably an advantage.
If you want to shoot sports at mega frames per second, buy another camera.
If you want to shoot indoors at high ISO in very low light, buy another camera.
But if you want an incredibly well thought-out and rugged camera that is going to spend most of its life outdoors, travelling, hiking, etc, then the K-7 really deserves your attention. There is no other camera that offers a comparable set of features for that market, at the price the K-7 has now settled in.