Hi Oleg7,

Sorry for this late reply as I saw your post only now. You could consider vArranger which is a software arranger(www.varranger.fr) It was initially developed for use with Ketron`s SD2 and SD4 hardware modules but now it supports a lot of other hardware modules and it also has its own softsynth built into the application. Morever Dan`s support is excellent. You could check out the vArranger forums, post your inquiry and you will be in a better position to decide. And what`s more it can support multiple hardware modules and you could even MIDI the output to a vsti(using virtual MIDI ports) for even more flexibility.

Regards,
Jez