My personal favorite, as mentioned before is the Turnpike Troubadours.
I've seen them live 5-6 times and have spent 2-3hrs talking with them at different times in a small venue after the show. They're very nice guys, even if they like to party a little bit. They've gotten much bigger now and are playing larger venues. If you like the music and get a chance, you need to see them live.
These guys write a lot of their own songs. The stand up base player is a pharmacist by education.
http://www.turnpiketroubadours.com/pg/music-video
You can listen to 2 full albums on this link. If this band doesn't become one of your favorites, you're not wired for this kind of music.
Gin-Smoke and Lies
My playlist for this band is long.
Gin Smoke Lies
Before the Devil Knows we're dead
Southeastern Son
Blue Star
Every Girl
1968
Kansas City Southern
Whole Damn Town
Long Hot Summer Days
Evangeline
Shreveport
Morgan Street
Wrecked.
Honestly, they don't have a song that I skip if it comes in the rotation in itunes.
Long Hot Summer Day
Before the Devil Knows we're dead...live version. Not my favorite version.
Every Girl
1968