I'm starting to see these "oldish" *ist DSLRs going real cheap in part of their age and the K20D/K200D announcement ($100-$250). I'm considering getting one "just because"... I have an extensive collection of Pentax K-mounts, screwmounts, and 645 (with an adapter). Anyone know just how well these *ist Pentax's DSLRs work with old manual lenses? Since I'm already significantly invested in other cameras, please keep in mind that i am not looking to get into AF Pentax lenses at all. This DSLR will be used purely for use with these manual lenses. If using my old manual lenses on this body requires me standing on my head singing cum-bi-yah, then I will pass. How is the viewfinder? Bright enough for manual focus? Can I get a split focusing screen installed? I'm in no hurry.. just putting a couple of my brain cells into considering it.