I just wanted to let other M3 users know that M3 preset programs don't give you a real idea of what the M3 is capable of.
I had my M3 for almost three months now, but did not have much time to begin doing any serious sound programming on it, so, I just recently began experimenting with editing this baby, and what a surprise I got !
The M3 can sound a huge step up from what is currently programmed from the factory. Re-programming both programs and combinations can transform the M3 to an "M3-Extreme".
The difference is substantial ! I would guess that the Korg programmers had to rush the programming, in order to release the M3 on time, this meant that a lot of the programs and combis on the M3 can sound much better if more time was spent on programming them. (so IMHO, the stock factory programs on the M3 do not do justice to what it can sound like).
The options of creating new programs, and combinations, and creatively utilizing the effects processor, which does sound fantastic by the way, can produce some wonderful sounding results.
Once I began editing the M3, and hearing what it is capable of, I had a big smile on my face

Regarding the optional EXB USB-PCM libraries, so far I have not heard any announcement from Korg regarding the "EXB USB-PCM" series, which would add additional sample based sounds to the M3, providing more focus on specific sounds (i.e. Orchestral, Guitars, Percussion, Vocal, Synths, ...etc)
I wonder what seems to be taking so long ? I think it's about time they release some EXB USB-PCM libraries, or made some kind of an announcement about it, more details, and what we could expect in the near future.
The EXB USB-PCM libraries, will give the M3 quite a bit of additional sonic power.
I can't wait to see this happen.