I stand by the APC BR1500 or BX1500 as a solid workstation UPS.
2 factors to look at with a ups is how many watts your are drawing with the gear plugged into the ups. Then the 2nd is how much uptime you need when the power fails.
I went over this in the other thread...the average pc is 400-500 watts.
Add a monitor or any other device plugged in and total it up. You want at least 10 minutes runtime for a solid shutdown. The BR1500 does voltage regulation which is a great feature to have to be sure your gear gets a clean consistent signal.
This is one of the skillsets I run at work and configure small time stuff like this all the way up to $100k UPS solutions for datacenters. If you need input on this let me know.
Ok heres a sample of useless info I know from work...
The bx1500 is a retail series, the br1500 is more a distribution channel series.
The BR model does FULL voltage regulation (buck and boost), the BX does partial voltage regulation.
The BR model has phone AND ethernet surge connections, the BX has phone only.