You did a great job taking those action shots! Your Biewers are gorgeous! In the first set, there two specific pictures of your B running with the ball in his mouth and those were excellent. You should get those framed!
My husband and I have the Canon 40D and we love it so much. We are hoping to get the 50D after Christmas. We had the Rebel before though and it was really great. More compact than ours. If you are interested in the smaller Cannon Digi cams, you should look into the Cannon Powershot A590. It takes pictures the fastest out of any other digital camera and the quality is decent as well. We have two of those to take on roadtrips and such!
I have an odd question to ask! -- How long is your B's tail? It looks like its as long as his body, but it is so pretty! I just got a beautiful B girl, and her mother's tail doesn't look THAT long! Just curious!