Damn! Busters/Blonds could have easily been the final round! This is a hard choice for me, but I'll go with the Busters; as much as I enjoyed the Blonds, I always preferred Austin and Pillman as singles wrestlers. Tully and Arn may or may not have been as charismatic, but they told a story in the ring like few teams that I've ever seen.
Harts/Warriors is a little easier for me to call; the Road Warriors were, perhaps, the greatest big man team of all time, but I always marked for the way that the Harts could go "AC/DC" on you, with Hart's wrestling, and Neidhart's power game. They had great tandem moves, and excellent chemistry. Plus, I used to mark out like a little kid to see Neidhart hit a dropkick after the hot tag.
Sooo:
Brainbusters
Hart Foundation