Which DSLR Should I Buy?

I am thinking of getting a DSLR. Which one should I buy?

I am looking for something quite cheep because I agree with Ken Rockwell that in most cases more features and pixels in DSLRs do not tend to improve people pictures. He does offer some good suggestions but I need to also consider several other factors:

1. I currently own 2 Nikon lenses. A 50mm 1.8 Prime and a relatively old zoom lens. Both require a motor in the body of the camera for autofocus. (which limits me to a D80 or higher, the D5000 will not work) It may well be better for me to replace these lenses but for now my budget is limited.
2. I don't mind Nikon and Canon but I also appreciate many factors of other companies like Pentax etc. (I also have access to several older Pentax lenses, though they are currently waiting for me in another country)
3. I am interested in used cameras as much as new, such as a used D90 etc.

Any suggestions or useful comments would be really appreciated. 

The image is a Leica S2, the DSLR I want but can not afford. 

Posted via email from Mark Whiting's posterous