i would go for a Swedish vallhund! i think there suppose to be good! not sure though 
Nah you could go for one of the ones with legs, (Norwegian Elkhounds) very bright, medium size, sociable, but can you deal with a dog who likes to please itself?
Seriously they can be trained to competition level in obedience as long as you can motivate them and not bore them to tears as they have to see the point, pleasing you is not enough.
Off lead they are not clingy dogs so need to be taught a reliable recall from baby pups. They are confident dogs who naturally do not stick at heal being hunting dog prone to following it's nose and going selectively deaf, but even if they bog off they will always find you

Seriously I find them so easy to live with as at home they chill out. They can be noisy if allowed to be, (they are supposed to bark when they have their prey at bay) but it isn't hard to teach them that barking will get their fun curtailed.
They are not the best for someone who likes a yes man workaholic, but great if you like a dog that has a mind of it's own and will work with you (not for you).