CyberPower is a competitor that also makes good quality UPS products. One thing to note, is the inability of most APC UPS products to support most newer, active power factor correction (active PFC) power supplies. Many, if not most, of these power supplies require a pure sine wave input, and most APC units that consumers can afford provide sine wave step approximations that may not work with your power supplies.
I offer this because CyberPower offers a pure sine wave UPS for much less than APC. You may not need a pure sine wave, but if you do then you will have the hassle of returning your UPS and getting a replacement, and paying a 15% re-stocking fee (unless you buy from a brick & mortar store). Of course, if you don't test it, you won't find out that it won't work until the power goes out and your servers crash.
You might want to consider this, which is quite affordable for a pure sine UPS. We got it a month ago for our HP Proliant G6 server (dual 750 watt PSUs) and it works great.
http://www.amazon.com/gp/product/B00429N19W/ref=oh_deta...
Go to this website and click on the seventh item in the list, "AN-147 v2", which is a PDF of an APC whitepaper, in which they explain why more and more modern power supplies are active PFC and require pure sine waves, which most of their affordable, consumer UPSs don't offer.
http://www.apc.com/prod_docs/results.cfm?DocType=App%20...
Here is an excerpt from that APC whitepaper:
"It is important to note that not all PFC power supplies will cause the UPS overload. However, the incompatibility is most acute in the one of the following situations:
• A large server class PFC supply (e.g. rated 500W or more) is used with a Back-UPS or Smart-UPS SC.
• The server is equipped with redundant PFC supplies (has two line cords) that are powered by the same UPS.
• More than one PFC supply is plugged into the same UPS, bringing the total power rating (nominal) of the power supplies to 500W or more.
• A workstation class PC (or high-end gaming PC) is equipped with a PFC power supply rated 500W or more.
In any of these situations, APC recommends that a true, pure sine wave, server class UPS be used. Acceptable models include APC’s Smart-UPS®, Smart-UPS® XL and S-UPS® RT family of UPSs. However if, a Smart-UPS SC or Back-UPS RS is to be used, the UPS should be sized accordingly."
The CyberPower UPS above also comes with software to configure and monitor the unit, and will shut down your server or workstation in case of a power outage.
I wouldn't worry about adding routers or switches, they typically use little power, I measured ours with a kill-o-watt meter.