Mukremin, after the wire watch "Oz" personally I rate that third after the wire and sopranos, and it has Mafia elements that I know you love! Ask Mickey about it if you need a second opinion.
Nicky, I seconded that. Although, I probably rate Oz higher, since it does not have a weak season unlike the Sopranos. It paved the way for some of the great HBO shows like the Sopranos, the Wire, Deadwood, Boardwalk Empire, Game of Thrones, Rome, etc.
