Hi,

Moi does a good job converting Nurbs to Mesh. You need Mesh in Modo anyway, so best to do it with the Moi exporter.
I recommend using OBJ's also check out the export function to get a correct scale in Modo. It's usually 1% or 0.1%.
Else, it's fun to work with both apps, only moi could benefit from a bit more speed on larger datasets.