I would say go to Truman! As you said, why take out more loans? And if you decide to get that degree in Music, you can do so later on, can't you? And as for finishing at DePaul, do they have a BSN program for when you go for your BSN? I know SXU has a BSN completion program (when the time comes....)
By the way, welcome to the site! Be sure to be counted in the IL State Forum.
'Cat'