Another vote for the Moser's here. They clean up the horses and my hubby's hair very well. They're very quiet and charge quickly. I wouldn't do a body clip with them, but they do the lower legs just fine.
Do you want to trim the dog or do major take-downs on his body?
I have Standard Poodles. I use the Andis AGC-super 2-speed for bodies and legs (sporting clip). I use the Moser Arco (which I LOVE) for face, feet, and tails. I don't think that I would want to use the Arco for bodies. I suspect that it would kill it, and it is too nice and expensive a clipper for that.