I guess the BIG question is will the DoGA files work in the new system and will they be able to be converted if not? A lot of the people on this site use DoGA and it would be a shame to loose all the current models out there that are already done and would be ready for use in SEV.
Doga can export to directX format (.x) but the models tend to be high in terms of polygons, which usually requires that they be optimized in another program prior to being important into SE5.