What breed of dog should i buy?

I'm looking for a dog that's good at agility and retrieving but i haven't found a good breed for me. i think labs,goldens,and German shepherds shed to much for me and border collies and poodles are a little too smart and active for me.So i'm looking for a dog that has small to medium amount of shedding,calm indoors and active outdoors,smart but not smarter than me,and will be happy with 40-60 minutes of exercise a day.what breed is best for me?