Speaking of country bands you might find accessible, you should try Little Big Town; I'm ambivalent about them, but their best stuff is like a cross between Lynyrd-Allman and California-era Fleetwood Mac. No one in the band comes close to singing as well as Fleetwood Mac, however. I reviewed them back in my Voice days. And we've argued about them a bit on rolling country - their most recent album was Xhuxk's number one of any kind for 2007.