Skip the pentax. The D200's will drop in price when the 300's come out. I'd wait and get one then. You'll have access to much better glass that way, as opposed to the pentax.
1999 e46 328i Ti Silver / Black[retired]
2007 e90 335xi Jet Black / Black[retired]
2011 e70 X5 35d Vermillion Red / Cinnamon
2011 e92 M3 LeMans / Fox Red extended