Breaking Bad is better than The Wire for me, although your other two Sopranos and Deadwood, it doesn't beat those two for me, as like The Shield too that I loved.
So many great shows though, I'm in a daze at the moment trying to put my shows into some sort of viewing order. I've got Boardwalk Empire, The Walking Dead, Sons of Anarchy, Homeland and I also want to start on the season of Falling Skies which started back. Although granted I don't think Homeland and Falling Skies are up there with the best I'll probably leave them to I've finished with the first 3. Not sure why but I love watching Boardwalk Empire up to Xmas, so might start on The Walking Dead first I think.
FD