I don't know much about what makes a good UPS. I was just looking at VA and Watts at first, but then I was reading how that does not translate to longer run time.
I am looking for one to power a 48 port switchbox (maybe two). I can always just ask if we can purchase an extra UPS so we have them dedicated to one switchbox.
I was looking at this by APC SMT1500C: APC Smart-UPS 1500VA SmartConnect Port Sinewave Tower LCD
This area only has the standard power outlets so NEMA 5-15p is necessary. And this setup would prefer a tower UPS over a rack UPS.