Ahh so they are using PCIe connect over cable, so that makes some sense. PCIe over cable is a great technology and the cost is comparable to 10Gbe connects. That's a much better option Vs. infiniband, being that you'd still need a network manager for true infiniband being that it doesn't understand direct connect. As long as they have the technology in place that can understand that connectivity, you may have to write the code to help the communication, but if they can guarantee connectivity, you'll see much better performance and lower latency.
Accusys has a great product that is very fast and works great with apple products, they have a great reputation for performance for video.
Synology has some decent products, but mostly geared towards a windows storage environment for unstructured data or true NAS Vs. Video performance.
The Accusys box although more expensive, may be better geared toward your specific video performance requirements, but the Synology could be a good option, being that it is 10Gbe and as long as it performs to their promised transfer rates, could be better for your budget.
Price/Performance over 10Gbe Vs. Infiniband I take 10Gbe, but prefer infninband (original discussion line)
PCIe over cable will soon become more predominant in the market place, and it is a very viable solution, which provides great performance for the price.
Sorry to be vague on helping you with your decision, but promoting a competitor is not my strong suit! LOL.
Aaron Vaughn
http://www.arcstorage.com