I'm partial to the Dixie chicks. Love Natalie's voice
Love the Dixie Chicks and I agree about Natalie's voice. She's one of my favourite vocalists in contemporary country. Have you heard the solo album she released back in 2013? It's a bit more rock/pop than country, but HIGHLY recommended.
Oh and the Dixie Chicks released a new live set (CD+DVD & CD+Blu-ray) called "DCX MMXVI Live" last month. Again, highly recommended and imo superior to "Top of the World Tour: Live".