Just browsing and spotted this. Way out of my league but what a beast!
http://cgi.ebay.co.uk/Wersi-Abacus-Duo-P...1QQcmdZViewItem

Before you consider it is out of your league remember it is upgradeable via software, and if required by off the shelf computer hardware. (Makes it pretty much future proof)
For more details the UK dealer is http://www.harmony-music.co.uk/wersi.htm you can also find demos of OAS6 here http://www.en.wersi.net and OAS7 here http://www.wersi.net/html/tontrager.html with more details on my web site http://www.wersiabacus.plus.com
Enjoy life, Play a Wersi

Bill

The Abacus always appears to me to be an instrument built into a case of an keyboard from a bygone era, the panel buttons remind me of the switches on my old Korg Polysix, it doesn't have the sleek lines of todays instruments, perhaps its indicative of the country they are produced in but its visual appearance is becoming very dated.

[This message has been edited by pasadoble (edited 10-16-2007).]

Hi Pasadoble
I agree it can look a bit old as it is based on Organ design (And so is just as modern as any) if you want a modern looking Wersi instrument then you need to go to the Arranger designs http://www.harmony-music.co.uk/ikarus.htm or for 2 manual http://www.harmony-music.co.uk/xenios.htm the sound and features remain pretty much the same, the main difference being that you have to use the touch screen more, and some people just prefer physical buttons with less use of the touch screen. (Wersi covers all tastes)

Bill