I don't think a dynamically loaded sample set is any different than a rom based set, other than that you wouldn't need to keep an E5000 around to load samples. Every part of the sound engine is sample based, so I can see being able to load samples dynamically as a welcome addition, if for not other reason that with a minor case modification I would never need to open my XL7 again to add samples. We could also do some tricks to allow patches to address more samples than the 8mb by paging, dynamically changing address pointers to sounds.
A lot of the atmel chips can be
clocked up to 100mhz, so I think we can respond quickly enough if we load things up in local ram and add some caching.
Are the roms the same for all 2500 variants? I would feel better about hacking apart one of the XL1's etc than a command station.
The other things on the emulated chips would be patches, beats and demo riffs.
Did any of the other sampler ranges include chip burners as standard or are they all 'Optional'?
Andre