Bite off some of the professional arena with comprehensive ProTools import/export
ProTools is the "industry standard". Paradoxically, the functionality lags behind other DAWs.
It may be worth-while to tempt ProTools over to Sonar's feature list.
To achieve this, the import must be improved. And a way back (provided certain limitations are adhered to) is also needed.
From what I read, ProTools makes an effort to remain backwardly compatible and doesn't change much from version to version. This can be used to advantage.
Here is an example where an attempt importing audio with markers was made, semi-successfully, using OMF (audio yes, markers no)
http://forum.cakewalk.com...F-import-m3391264.aspx Sonar already supports RTAS plugins.
OMF is a problematic format. Not only that, trying to find equivalent features between DAWs gets difficult the more detailed you go.
I don't know if importing ProTools' file format directly is legal (back-engineering?)