Here's some of the machines I've been using @ home and work. Don't mind the one. It's in rough shape but my main workhorse so its on more often than being maintained.. lol
There isn't much to show with the couple on servers. Virtualized environments HP/EMC in a couple racks. Missing 5 laptops in that. Will be adding another of the dell i7's soon.
Don't have many punching with a GPU yet. Last time I put in any serious crunching time GPU units for nvidea were flaky at best.
Edit: Those 2 loose servers are in the basement. Haven't got the sqlbox installed yet and still have the other 2 1u to get ready work, family and health issues have kept my time lately.