Sounds like you've got a nice stable setup :-)
I don't have any first-hand experience with the Ethernet Audio type software - but I know it exists. I personally use ADAT (for Audio) and MIDI to link my dedicated VSTi PC to the primary DAW. I record the audio and MIDI to their own tracks so I can load up a different VSTi Plug-in on the main DAW during Mixdown if I decide we need a different sound that we initially recorded.
I'm not exactly sure how the Ethernet Audio Driver would integrate with the RME ASIO Driver in your host DAW. For me, it's easier to use the HDSPe MADI Card and bring everything in through it (Analog I/O plus the ADAT I/O from the VSTi PC). This way I'm only using the single RME ASIO Audio/MIDI Driver in Nuendo.
Please note - this will not get around plug-ins that have a high latency - this will only help with plug-ins that need a large RAM/CPU footprint so you can free-up the main DAW PC for tracking and mixing duties. If you run a highly-latent plug-in (VST or VSTi) on either PC, you'll still have real-time latency concerns to deal with (not generaly an issue for mixing, but can be a show-stopper for tracking depending on your setup). I run both DAW's at 32-Samples, and the latency is literally a non-issue.
I know at least a few people on this forum are likely familiar with the Ethernet Audio Software (can't recall the brand/model) - Maybe they will chime in? I've also seen it mentioned numerous times over at www.cubendo.com ...
Report back and let us know what you find!
![cool](https://forum.rme-audio.de/img/smilies/cool.png)
MADIface-XT+ARC / 3x HDSP MADI / ADI648
2x SSL Alphalink MADI AX
2x Multiface / 2x Digiface /2x ADI8