I record acoustic guitar music on a PC and am considering upgrading my
original MOTU 2408 (20-bit) system to the newer 2408 mk3 (24-bit)
system. Are the A/D converters significantly better with the 2408
mk3? Will I be able to hear a difference? Are there better systems
out there for the money?

Right now, most of what I record will end up on CDs (44.1 khz /
16-bit). What are the benefits of recording and editing at 96 khz /
24-bit when the end result will be on a CD?