I would love to see a picture of that unit Drax.
I have been using a similar weighted UPS from CyberPower. Even though it is rackmounted it is still a bear to transport. Luckily I believe strongly from my production background that every box should have wheels. So it rolls effortlessly. I just hate to lift it when we need to.
This is the unit I am using in 3 different installations with Zero problems.
http://www.cyberpowersystems.com/1500avr.htm#
I noticed Best Buy has them for $250 now. I paid $399 a year ago. I believe I will go pick up another one or two today. This is the best price I have ever seen for a rackmounted UPS system.
The AVR (automatic voltage regulation) is awesome. I have watch brownouts and surges happen and the UPS just beeps and smiles.
IF anyone does not have a decent UPS then I highly recommend this one.