Whats the best sounding format to use when importing cds onto itunes and then to a ipod

Question

Whats the best sounding format to use when importing cds onto itunes and then to a ipod

Answer 1

itunes converts them automatically to mp4 when u import them. and plus mp4 sounds great.

Answer 2

I use AAC 128 bit rate. Sounds great when listening with headphones plus it's a nice size file for your ipod.