Is there someone With nuendo 64 bit who is using the Lexicon PCM reverbs with Jbridge who can tell me how to get it not to crash?
From my experience Nuendo 32 bit has better performance if you are running 32 bit plugins. You still get the benefit of 64bit os (extra memory) and 64bit drivers.
Try an experiment. Benchmark 32 bit vs. 64 bit Nuendo and see which one performs better. Try existing projects that have many tracks and plugins.