EOS 1D and 300D (hey its built like one)
Seriously, its (300D) not much larger than stuff like the pro-1 and is pretty light. Image qualty is superb though, much more so than any prosumer offerings, but not quite up to the standard of the EOS1 series.
(somehow the colour and noise rendition is more pleasing + its much easier to get the shot with the 45 pt AF)