Very true... but many of us (including myself) is deeply poisoned... I think I must sign myself up for a cruise that provide no internet service and go away for a while... to fight the addiction of buying new camera stuff... sometime like this popular chinese Official Zhu De
I think you have not yet fully explored the features of 40D, so I suggest you to use your existing camera and when you feel it to not be enough for you, than you should change it.