Scott,

I'm sorry but I strongly have to disagree with your point about the better musical timing you think you experienced at 24 bits.
The 24 bits resolution has NO better timing than 16 bits ! Only the amplitude-is more accurate. Only the sampling frequency could bring a better timing..... but NEVER detectable by human ears

I used to have a Roland VS880 and a VS1880 and they both have parameters to set the sampling freq. to 32- 44.1 and 48 kHz. I'm honest now and must say it was VERY hard for me and others friends to hear quality differences in recording frequencies. (As good as none)

Ed,
The AW16G has 24 bits AD/DA conversions says my manual! In fact I don't care either.... as long as the sound is better.