It is very hard to pick a breed you like the best, well, for me it is. I have had G.S.D's - Blue heelers -many Poodles - Bedlington Terrier -Hubby has a Doberman guard dog - a few ?? dogs - now have a cross bred.
For intelligence, I would go for the 3 = G.S.D., Poodle,Heeler....but the Bedlington is up there too....so how do you choose?