Ahhhh...I think the only benefit would be if you plan on doing a lot of additional editing/processing to the files.
The original 16 bit files would NOT be improved by taking them to 24 bit...but if adding FX/edits…it would work better at 24.
When you go from 16 to 24...you just get 16 plus some "zeros" added in to "fill" it out to 24.
With additional processing/editing...those "zeros"...that "extra room"...
...would allow things to "grow" easier/better.
That's not a perfect example...but it gets the idea across... 
If you are NOT going to do additional processing/editing...then leave them at 16...
...why increase the file size with no real benefit?
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miroslav -
miroslavmusic.com"Just because it happened to you, it doesn't mean it's important."
