Originally posted by Jonathan Mac Canon have always been behind in sensors, at least in APS-C. When I bought my K200D (just after it was discontinued) I remember being surprised that it was rated the best APS-C sensor on the market aside from the one in the Nikon D90. It was ahead of all the Canon sensors, even in the pro APS-C bodies. I think if you check now you'll find something similar when compared to newer sensors from Sony, and maybe others.
However, the big problem with Canon is the very poor build quality for the money you pay.
thee K200D sensor was great indeed. It was the last version of the sensor seen in K10D, D80 and D200. I loved it in K10D and I don't think Pentax had camera with better sensor until K-5IIs came out.
as far as the build quality goes, these cameras are meant to last a year, maybe 2 then they want you to buy the newer and better anyway, so why bother...