The answer is the same as I would have given you 4-5 years ago if you had asked "What draws people to Pentax ?". I came from a Nikon film SLR (with a considerable but not huge investment in lenses) and bought a Pentax K100D. The reason was that Pentax offered great value for money (at least in terms of the features that were important to me) compared to the Nikon models at a similar price point. Pentax was also making the best kit lenses that you could get for the money (I personally was not interested in acquiring a collection of primes or pro quality zooms).
I can say that I got more than my money's worth out of the K100D over the last 4-5 years. I have been yearning to upgrade to a more advanced model (along with some better lenses) for the last few years. We have a new kid on the way this year and it's just the excuse I was looking for to finally upgrade (also made it easier to talk my wife into it
). I was looking at the K-5 + 18-135 WR combo vs the Nikon D7000 + 16-85 VR. My heart was set on the K-5 (loved the compact size and the ergonomics) but my mind told me that the D7000 was the better deal (at least for me).
I could see why the K-5 commanded a higher price (built-in SR, slightly faster frame rate, deeper buffer for continuous shooting, more customizability, better WR, etc) but in the end none of these features were ones I could not live without. At least I personally could not justify paying $250-300 more for them. The D7000 had it's own share of advantages (better AF tracking, dual SD card slots, more manual control in video mode, etc) that seemed to be more useful at least for my own shooting needs. Needless to say I ended up getting the D7000 and have not regretted my decision so far.
Dapeek