https://www.system76.com/
Laptops, desktops and servers with Ubuntu pre-installed. Some beautiful machines on the desktop front, pretty standard heavy lifting on the laptop front, but reasonable price points.
http://store.steampowered.com/hwsurvey/
Interesting survey of computing hardware in use. Not sure of location / etc.
http://www.drbd.org/
DRBD is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid-1.
http://www.scan.co.uk/
Scan are a fairly cheap source of it / computer / ict kit / equipment in the UK.