Well, I guess the only people who could really answer this for me would be those who had the 20D and now have the 40D. I primarily shoot birds with the 400L f/5.6
So, I am curious as to whether or not the 40D will give me a significant bump up in IQ. Just the spot metering alone is very tempting as it would be a big help. That being said though if the IQ is not significantly better than I will continue to hoard my pennies till I can afford the MkIII.
Any advice from those with hands on experience would be greatly appreciated.

