Originally posted by happygodavid - I would prefer light and small, having grown accustomed to a P&S, but I'm not completely opposed to the idea of something bulkier.
The K2000 is certainly light and small, but I think your other requirements rule out the K2000. My K10D feels good in the hand and not as bulky as its class counterparts from other brands, IMHO.
Originally posted by happygodavid - I am outdoorsy. E.g., I'm going to the Boundary Waters Wilderness and Canoe area in Northern Minnesota for 6 days. Wet, cold, potential spills from a canoe... I definitely want weatherproofing (btw, doesn't the K200D offer weatherproofing as well? I seem to get the impression from this forum the K200D isn't weatherproof).
The K200D offers lesser weathersealing (none of them are waterproof) than the K10D/20D. The K2000 isn't weathersealed, IIRC. In my experience in rugged outdoor conditions like the Boundary Waters, the K10D is the minimum camera I would want, coupled with DA* weathersealed lenses.
Originally posted by happygodavid - I would rather buy only nice lenses (within my budget). E.g.- I'd prefer to not buy a kit lens if down the road I'd be better off with the equivalent specs (but better quality) for say, $350.
The DA* lenses are the only way to go for your IQ and weathersealing requirements. That's expensive, so you could also consider the new WR versions of the kit lenses (less weathersealing than DA*, but still sealed). If you opt for the DA* lenses, the K2000's weight balance would be way off and the compact body benefit would be lost with such large glass.
Originally posted by happygodavid - I have no intention of photographing a Nascar event, either now or ever in my lifetime.
Well, that settles that debate...
Originally posted by happygodavid - I would like to photograph nature scenes and people. Now, Nascar fans, on the other hand could make for interesting subjects...
Any of the Pentax bodies (or Nikon) will suit you well for the subjects you want to shoot. The K2000 and D60 are not good options for the locations you'll use the gear in. The K200D is a minimum, but a used K10D or K20D seems to be the better choice in my estimation. Good luck!