Move to 3930 if you can
I spoke with a Silicon Optix engineer at CEDIA regarding the 2930/3930/5930.
As indicated the top two models use the high performance Realta while the 2930 uses the Reon.
He stated that the Realta can be upgraded as new decoding algorithms are developed, but the Reon cannot. So if you get the 3930 and SO develops new DSP algorithms, the 3930 can be upgraded but the 2930 cannot. So your investment is "secure". He said that on the video side, the 3930 and the 5930 are the same. The 5930 is more costly because of the higher grade components in the audio section and the larger feature set. He felt that the 3930 was *the* one to buy, best performance/dollar.