I agree with you about the anti dust technology. Whilst the implications of dust might not be as great for digital as they are for film development (as they are more often than not correctable on the PC) I personally think that it is still an issue, remembering that any contamination could appear on every photograph if the condition are right for it to do so. For example, on a recent week long holiday I took quite a few pictures and upon loading them onto the PC it was apparent that dust had become an issue on the second or third day which lead to me cloning out dust on the remaining days shots. Whilst an anti dust system might not be 100% effective I hope that that it will reduce both manual sensor cleaning and time spent processing shots on the PC. BTW a poster here has reported taking over 1,000 shots with his new 400D with no dust contamination visible. That certainly wouldn't be possible with my 20D. To me therefore, the addition of anti dust technology alone will be enough to persuade me to change my 20D.