Hi, I appreciate your thougths on the Wersi; here are mine. On the sound front I have not hear a Wersi but I have owned a Kurzweil K2000VP, Roland SRX classic keys card an Akai SGV01 (vintage module from 1996) as well as the originals that they try to emulate. The Roland was nowhere near as good at recreating vintage sounds despite having buch bigger samples than the Akai and Kurzweil so in my experience it is much more than how many megbites or gigabite sof sound. The same goes for soft synths - the Ron Papen did not blow me away despite being hailed as one of the best soft synths.
The other think about Wersi is that they have no UK presence worth mentioning at present and I have reservations about the technology that they use in their product. My preference is to be behind the curve of technology because you are normally better off. Whilst I appreciate that all modern keyboards have a 'computer inside' there are computers and computers and I do not like the windoze based ones.