That's $30 more than I want to spend. And I'd need to get at least 2, because my router and servers are in a different room.
How much load can those batteries handle? And how long will the batteries last (The first thing to stop working on a UPS is always the batteries, and you're not saving money if you're replacing them every 6 months)? Also, there are safety issues; at work, we had a cheap UPS whose battery leaked and it started a fire (I'm told).