For me personally i would like a collie x, either 3/4 x 3/4, or 3/4 x 5/8 3/8, and preferably a breeding of one dog that has been a VERY prolific rabbit dog, lamping, bushing, ferreting and the other a very handy dog on stuff that bites. The idea being to create a pup capable of both, and a generally more rugged dog than a straight 3/4 (i.e half x pure). At least that's my theory. Looking at what i do and the land i hunt, and what quarry is there, i think that would cover all angles, and last well.