What Breed Of Dog Should I Get?

Im Hoping To Get A Puppy Soon. Im Going To Get A Purebred, Im Going To Entry The Dog In Some Dog Shows When Ever She Gets Old Enough. Im Going To Be Able To Walk Her Everyday. Size Does Not Matter, I Just Don't Want Huge Dog Like A Mastiff. Hopefully Easy To Train. We Have 2 Other Dogs, A Pit Bull/Lab Mix, And An Old English Mastiff/Lab Mix There Both Girls. We Also Have 2 Small Rabbits, And 2 Cats. So The Dog Needs To Get Alone With Them. Brushing Is No Problem Either. Youngest Kid In House is 11. I Have Lots Of Free Time For The Dog. I Might Breed The Dog. So Far Im Thinking Of Getting A Pomeranian, But Im Not Sure. Please Tell Me Some Breed That Might Be Good For Me Or Just Tell Me Your Favorite Breed Thank You For The Help.