I watched it already but it is an awesome show!
Fawkin' rights...if you liked that show check out "The Last Chapter." It's a mini series...very closely related to that world.
Otherwise my guess is you've probably seen all the good ones. Tons of great shows out there these days.
My all time favorite is still The Sopranos followed by Boardwalk Empire, Breaking Bad, and The Walking Dead Season I.
Rome I & II was great, but got cut due to budgeting reasons.