Well, trying help on daz forum is really frustrating. Nobody answer properly a question. Each 10 replies just 1 had really read the question and comes with a clear answer, the other 9 says just bullshit.

About the mesh problems, I tryed something in a Studio 4 pro version using my content in a Backup HD, and seems that it loads the same errors and mesh problems. Don`t buy it until everything work fine in the standard version with your current projects.  The only diference that I saw in Studio 3 and I could notice in Studio 4 from the standard and the advanced x64 is that in x64 you an load projects that require more than 4gb of ram.

Of course, this is in my case, I don`t often to use all the advanced features from DS3a, just the large memory factor (some projects take 6 or 8 gb in memory).

Good luck again :)