I like the song choices on Orphan Black. The music each clone listens to says something about them. Tatiana Maslany has said she used music to help her differentiate each of the characters. Spoilers ahead if you don't know who the different clones are.
This episode Alison was listening to Meredith Brooks. That's probably as edgy as she gets.
Sarah listens to The Clash, of course.
According to the BBC America site, Cosima's playlist includes a lot of electronic music.
I'm hesitant to even guess what might be on Helena's playlist but given her background some Gregorian chant sounds reasonable. But as Moxie pointed out in her comment below, Helena was comfortable in the club so let's mix that chant with some electronic music. How about some Enigma?
I know Sarah went through Beth's stuff but I can't remember what Beth listened to.