I would prefer one disc, personally. I like multichannel music, but have little interest in extras. On most of the discs I have, the extras get played once or twice to satisfy my curiosity and that is all. The main reason I bought CD's in the first place was not to have to get up to change the side. Following this thinking, I also bought an early carousel player. While I didn't like digital until my recent acquisition of an Oppo, it made sense while doing other things. I use longer pieces of music to get through long tasks without thinking about changing discs. I have no experience to rely on or to comment with for changing layers, but I would guess it is less of an issue nowadays.