Motherboards last about 2 years before they become obsolete, and so Lionstracs like Wersi will be using a different Motherboard and CPU during its lifetime, (For instance over 6 years ago when Wersi released their OAS instruments, they used a Celeron 533Mhz CPU and 128Mb of PC133 Ram, the latest instruments use a Sempron 3500+ and 1Gb of DDR Ram, which earlier instruments can easily be upgraded to) and that is the beauty of am open system in that you can always keep upgrading both Hardware and Software without having to change the instrument.
Regarding VSTs, be careful as with some (Particularly the Free ones) as little as 2 or 3 used together will Max out your current CPU.
Hope this helps

Bill