Please! Wersi updated (unless you count simple software ones, which are free for all other arrangers, too) are anything but free.

Here's a quote from the Wersimusic site...

"After the release of version 5.0 software, the need for faster processing became more important to the performance of the Instrument hardware. We are currently offering a hardware upgrade to greatly increase the performance and stability of the OAS software. This new hardware is compatible with all versions of software and will increase the capabilities and reliability of the OAS instruments. This upgrade comes complete with new mainboard, processor, RAM, and power supply to replace all older components. Instructions and technical support is also provided with this update. Please contact our Service Center for more information."

Sound free to you?

The thing about software driven synths and arrangers is, just like computers, you want to run the latest software, you got to have the latest hardware too. Trying to run todays software on yesterdays computer is an exercise in futility. Same thing when there is a keyboard housing it, IMO...
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An arranger is just a tool. What matters is what you build with it..!