I'm very glad to know that import works well in Bryce also. Thanks for the feedback ;-)
I will be on holliday in a few weeks, and, besides continuing (and hopefully finishing !) my animation project on Tannenberg, I intend to improve some other models, especially the castles of Crest and Dourdan.
As I now have Bryce 5.5, I will most certainly convert the models directly for Bryce, Vue, and Lightwave. For Poser and other apps, I'll stick to the obj format, because it's boring to create piles of folders to create props or figures :)
As you might have noticed, my very passion is the modelling of existing medieval buildings. I will certainly try to go for churches and abbeys next.
So if someone wants some specific building, don't hesitate to ask. (but I don't guarantee a) that I will do it; b) that I will be able to model it ; c) how long it would take :-) )