I am going to have to break with popular opinion and go with a big Gore victory.
I do not believe the south would go with two northeast candidates like Powell and Almond.
Simply put, the south would not cast their votes in large enough numbers for a black candidate. Powell would have attracted a larger share of the black vote, however, by in large, the black voters would remain predominantly loyal to the Democrats.
Gore is as well able to win in traditionally Democratic states in the north, midwest, and west coast.
Nunn helps Gore in the south and does not hurt him in the north and midwest. Almond does not add anything to the Powell ticket.
Gore/Nunn 363
Powell/Almond 175