The Studio 150's are driven by all-McCormack electronics, SST-1 transport, DAC-1, TLC-1 and DNA 0.5 Deluxe.
It would be tough to pick just three recordings. A few of the ones that sound great to me are; Talking Timbuktu - Ali Farka Toure and Ry Cooder, Temptations - Holly Cole, Breaking Silence - Janis Ian, Wicked Grin - John Hammond.