To rip my CDs, I boot in Windows with Boot Camp and use EAC with some plugin that converts my tracks directly to ALAC. I don't know if the result is worth all this trouble, but I do it anyway.
To listen to my music, I use iTunes, which feeds the bits to my Duet. I love this setup a lot except for the fact that my MacBook fan can get quite noisy when I do a lot of multitasking.