I still listen to GP and Grievous Angel frequently, and have sought in vain for anyone able to recapture the soul and sound that Gram and Emmy Lou manifested on those albums.
Good News!! Anyone who has a lasting affection for those classic recording should run not walk to their nearest CD vendor and pick up Begonias by Caitlin Cary and Thad Cockrell. This is a great album with terrific songs, chilling harmonies and a shit-kicking backup band to boot. You can order at www.yeproc.com if you can't find this, but get it! Cockrell is a veteran of Uncle Tupelo and Wilco, so he has some alt-country credentials, but this album is much truer to the original Cosmic American Music concept than his previous work.
You will love it.