Seconding this. The 2012 "update" was no more than a slight rearranging of CPU and RAM within that same generation of parts. The thing still uses all 2010 era parts (radeon 5xxx graphics, westmere xeons, 3gbit SATA, PCI-E 2, no thunderbolt). It has been "due" for an update since sandy bridge xeons were released in early 2012.
Yep, I've used that for a little while, but I wasn't a fan of the design, and I didn't think they visualized the information as well as they could have, so I made a new one :)
It's all online, but there's an awesome app called Mactracker (http://www.mactracker.ca) that I got a lot of information from. MacRumors also has a buyers guide (http://buyersguide.macrumors.com), but I think mine is better :)