I really like this show too. I've watched the first 3 seasons, but haven't seen season 4 yet.
I disagree that it's the best show going right now though. It's consistently entertaining, but shows like Breaking Bad and Mad Men are also consistently entertaining while still doing something new too. I'm not saying this show is unoriginal or anything, but compared to those two shows it's relatively formulaic. And, while I like Raylan a lot, he feels too much like your typical invincible badass hero. He's got a little baggage, but I feel like the relationship between he and Boyd could be explored a little more, especially in regards to their past. I thought they were going to do this in Season 1 (I think it was the pilot) but after Boyd got shot that was kind of it. The two still have great chemistry though, and that's one of the highlights of the show. Really, the villains, especially Boyd Crowder, are the best thing about this show along with Nick Searcy (forget the name of his character). Margo Martindale was incredible while she was on the show. Glad to know she got an Emmy for her performance. Neil McDonough is great in anything he's in (check out Band of Brothers if you haven't already), and Mykelti Williamson looked like he was turning into a good villain at the end of Season 3.
I've heard Season 4 is the best. Looking forward to watching it.