I'm looking to purchase two Mac Mini's (A/B) to run OS X Server on it and install them in a Sonnet Rack Mount Mini 1U enclosure. I will be running the following services: DHCP/DNS - both Open Directory - both File Sharing - both Time Machine - B Profile Manager - A Calendar - A Caching - B NetInstall - B As for usage, there will be a dozen Apple devices (Mac and iPhone/iPad/AppleTV) accessing all of its services. There will be a dozen or two more devices accessing just DHCP/DNS (internet of things). So while usage will be fairly minimal, I don't see needing anything more than a i5 processor to run these tasks. I think 4GB would probably be enough, but having 8GB would be safe in case future upgrades to the OS and server app require more. So it really comes down to storage options. I rather not do Fusion and have to deal with it breaking if one drive fails. So it comes down to a 5400rpm 1TB HDD or a 256GB flash drive. I don't think those options are available on the 1.4Ghz, so 2.6Ghz, 8GB memory is the baseline. Also, would it benefit any to add a thunderbolt gigabit adapter and have a second port available? Or I found a 2012 model with server for $50 cheaper, but only 4GB ram standard with 2x1TB 5400rpm drives.