Hi Robin,
Earlier this year we considered doing the same, migrating from Oracle/Unix to Windows/SQL and upgrading to v10 at the same time. During our research we found that yes you can migrate and upgrade at the same time. There are new tools available. We contacted Infor Professional Services but there are other Partners that have expressed their ability to do the same. Our decision not to move forward at this time was not from cost or complexity but was based on other factors.
Hope this helps.
Cindy