I want to piggyback on what others have been saying and modify it a bit. While Pentax does have a smaller lens selection than Nikon, Canon and even Sony, unless you’re a pro it won’t mean anything to you. Their lens selection is good for even advanced users and in the area of prime (non-zoom) lenses, Pentax is unmatched.
Another plus is that Pentax offers the most features per dollar of any DSLR maker. They listen to their users and give them what they want. They have unique modes that no other camera makers use (eg, I use TAv mode more than any other on my K5)
I wish I could justify spending $1k on this but I have a perfectly good K5 and K01 in my bag. My wife wouldn’t understand the need.