I like virtually ALL Christian music (from the past dozen or so years). Rock, rap, pop, worship, funk/crunk, and punk included.
I'm kinda limited in other bands because most of the non-Christian bands I've checked out I hate, they scare me, or have cursing in their lyrics and I'm not gonna listen to that. I do like a few bands, though.
I'm right there with you about the blugrass---Yonder Mountain String Band, Old Crow Medicine Show, Nickel Creek
I also like----Fleet Foxes, Devandra Banhart, Regina Spektor, Pentaphobe,
Corvus Corax, Lykke Li, Sarah Brightman, Beats Antique, Paramore, on and on and on
And Dan Zanes...even though he is a kid's musician...