In my opinion, if you are only running one computer off it (ie. no peripherals), any 1000VA line interactive UPS will be fine. the price variations come from the type of UPS it is, battery backup, line interactive or online. online UPS is the most expensive and in my opinion a bit more than the average home needs. it converts AC to DC then back again, thus smoothing absolutely out all power irregularities. line interactive is a step back from this, protecting from surges and making up for drops, without the double conversion. unless you have notably volatile power at your house, it is completely capable. as far as a brand, eaton & apc are the most well known, but really, any will do the trick.