Doc, interesting you listed Rachel Yamagata. I saw her when she opened for for Ryan Adams. I liked her sound, and she's a real cutie too.
I have an MSB paired w/ an Aiwa changer both modded by Stan Warren. I compared it to Marbles' set up which consisted of a Sony transport and a Perpetual DAC heavily modded by Emperical. I thought my setup held it's own in terms of smoothness and listenability, though Marbles rig had better resolution. However mine cost about a third as much. I don't know how stock MSB compares.