Based on reliability I would go with the Mac (vs. the SACD standard, which was/is unreliable and prone to failure).
For sound, I would probably also go with the Mac unless you are going way up the krell line. If you are looking current model entry level Krell players, many are being made in China.
FWIW, I love Krell and if the question pertaining to amp I would be recommending the Krell amps or even the preamps (non-KAV series).