Originally Posted by ogl 
50D has old AF module too. And no SR and weather-sealing. If Pentax will make K20D super with 1/8000, 5 fps and new AF - it could be very good...
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the 50D has a new processor which should help. there's one report out by a wildlife photographer who claimed it was the "fastest he's ever used"... certainly not conclusive, but hopeful. of course in DPR, all the moaners still want D300 level AF
Originally Posted by Gooshin this is entirely personal opinion but Canon has been developing CMOS technology for consumer digital camera use alot longer than Pentax (again, as far as i know)
therefore there is something to be said about the new 15mp canon chip other than simply an icnrease in MP count.
there's supposed to be a new design of the microlenses which should improve the overall sensitivity and again some initial results indicating an IMPROVEMENT on the 40D