Considering 3DGS - well I don't want to sound too harsh but apart from people who did use it for years and know the engine very well there's no reason to prefer it over virtually any serious engine out there.
, its very cheap (com. version is only 150 euro
).
I also don't really see any serious advantages 3DGS has.
, I personally don't know much of the spec differences, but in this thread
http://forum.unity3d.com/threads/187356-...d88c1738cdf3056 , a poster called DaviHimura seems to have some decent arguments.
