Best complete box sets

[sunnygym]

I'm currently watching breaking bad (just about to start season 4) I bought the complete DVD box set 1st to final episode and it been nice watching a few episodes back to back and using the surround sound as well.

What I want to know is, what other box sets 1st to final episode is out there that's worth buying on DVD?

I've also watched The Sopranos start to finish so no need to mention it

[sunnygym]

Thanks for the suggestions. Has boardwalk empire finished yet ? I heard that's pretty good too.