1000 ISO?? The 10D will do 3200

(jk WT, the D60 is still and always will be a very nice camera).
I haven't used a 300D (Digital Rebel) too much but I have a friend who can't say enough good things about it. I agree that if you are willing to spend the money the camera will perform very well.
The only thing that I see that should have been added to the 300D was allowing it to shoot in RAW format. JPG is nice but it can't compare to the flexibility of RAW. But like it was said earlier, that is just one of the features that separate it from other cameras.