Hardware : which ARM mini-pc to replace an x86 server ?

I actually have an x86 server (based on an Intel Atom N330) that consumes around 40W. As ARM based mini-pc offer is growing, I selected some devices that are eligible to replace my x86 server.

I’m not going to replace my actual server with only one Arm mini-pc : I’m more on replacing each OpenVZ container I use by an Arm device. Even with 3 Arm mini-pcs, I will devide by 2 or more the power consumption with at least the same computing power (if not more).

Bellow is a comparison sheet I made, based on my following ideas and expectations:

• I don’t look anything with less than 512 Mb RAM (think about flash storage optimization and native linux file cache mecanism)
• I don’t look anything without an ethernet port (I don’t like wifi for servers, nor usb2ethernet)
• I tried to estimate the approximate computing power to compare against well known x86 processors (but I know that it really depends on real usage…)
• A NAS can only be done with a gigabit ethernet and sata/e-sata port (full hd mkv streaming, big files transfert throught dual channel wifi, etc.)
• Final price should be estimated with delivery cost, local taxes and money (France, Euro)
• Linux support (at least debian or archlinux)

Here come 2 new challengers (edited on 08.03.2013):