Hello Spalding
You can have as many demos as you like, but if you don’t like the style in which they were played, then you will never like the sound of the instrument, no matter how good the sound.
As has been mentioned in many threads, the only way to find out if you like them, is to try them for yourself, so pop over to Harmony Music in Boston http://www.harmony-music.co.uk/index.htm were you will be able to try out the Wersi OAS instruments.
Hope this helps.

Bill
BTW I have posted many demos (on various threads) of the Wersi OAS 6 instruments (Now superseded by OAS 7 which realy does take them to a whole new level) and also sites where demos of Akai, Gigasamples and VST instruments can be heard, but I have not seen hardly any comments, good or bad, or indeed what needs improving, so I sometimes ask myself what are the point of demos, if nobody takes any notice.