Which UPS brand is the best (and has friendly prices)?

APC is the standard, that is almost every OS has drivers for this brand, they cover from a 350VA that might handle a small PC and LCD monitor to a 1500VA that I've powered a server-class system:

3 Hot-swap PS, Quad processor, 16GB RAM, up to 7 hot-swap hard drives... even with this beast on the 1500VA, I could also put the network switch, Linksys firewall/broadband gateway and cablemodem and it could run for 45 minutes on battery.

TripLite is another brand that has from the low end system up to something you could power a server and more and is supported natively by many OS.

I've also used CyberPower, good, cheap, but there are less who support it, so your OS might not natively work with it and you'll have to install software.

VA - Volt Amps is the measure of UPS / battery backup power, a rough figure is that for every watt you need two VA's (so a 1000VA will do roughly 500 watts).

AVR - Automatic Voltage Regulation, this may be an APC term, so other manufacturers may call it something different. When you get a brown out and all the lights in your house dim but stay on, or get a surge, AVR will convert that to a non-damaging voltage.

Ups Brands

As a consumer, if you live in a place with clean and reliable power infrastructure with 99.99% up-time, then you probably don't need a UPS. If you're a business then it's a different story. I myself only use a good surge protector/suppressor. To answer your question, good UPS brands are APC, CyberPower, and TrippLite.

look to Emerson and Phoenix too, they both have good UPS for PC's and for Servers.

From what you say i would not bother with a ups as there is no real need for you to use one.