@lvoss:
Medium size, low grooming, sporty, natural looking - I think you just described a Basenji!
I guess I would ask, if you don't have another breed in mind, are you really sure you don't want another basenji? Truly your criteria matches basenji though there are some other breeds that could also be a fit, like a whippet.
I did describe a basenji, didn't I?
I like whippets as well.. but I always have a problem with their heads being not so friendly.. (this does depend on their colloring/marking)
There is one problem with adding a b-puppy.. the period when they are born, doesn't fit my lifestyle at the moment.. And BF has some doubts.