i've spent around a £1000 on components so far...as well preventing data loss i wouldn't want my components to be damaged..
Anyone can (but did not) read its specification numbers. It provides temporary and 'dirtiest' power during a blackout. So that unsaved data can be saved. Data already saved to disk? A UPS does nothing.
Hardware protection is only provided by in subjective myths and hearsay. When not in battery backup mode, a computer connects directly to AC mains (and anything destructive that might be on those mains). UPS takes almost forever to switch to batteries. Fortunately a computer can supply its own rock solid power during a period when the UPS outputs no power.
300 consecutive surges could pass through your computer before a UPS even thought about switching. And then a millimeters gap inside that UPS will stop a destructive transient? Of course not. It does not even claim to. But again, anybody can read that UPS specification so see near zero hardware protection. Others using subjective reasoning are easily manipulated by propaganda and advertising.
What happens when voltage drops? A computer adjusts accordingly. Any voltage adjustment is already done better inside the computer. Portable devices are even better. Again, numbers. Their ideal voltages are 265 volts down to 85 volts. How often does your voltage drop to 85 volts? So that UPS solves a strawman.
Now, when voltage goes to zero, UPS power to a computer is worst. One utility demonstrates how 'dirty' in pictures:
http://www.duke-energy.com/indiana-business/products/power-quality/tech-tip-03.asp
See those square waves? Described in advertising as a pure sine wave. Not a lie. Square waves are nothing more than a sum of pure sine waves. Since they are educating others who ignore facts and numbers, then most will recommend a UPS for 'clean' pure sine wave power. But again, how many posters included numbers?
Superior protection is (must be) already inside your computer. A 230 volt UPS will even output 400 spikes. And that is perfectly ideal power to any computer. Superior protection inside every computer makes 'dirtiest' UPS power irrelevant.
What exactly do you want to protect? Harmonics, frequency variation, floating neutral, power factor, noise? No solution solves every anomaly even though UPS advertising claims otherwise - subjectively. Best protection adjacent to a computer is inside the computer. Anything that might overwhelm that superior protection is best implemented where anomalies would enter the building. That means spending tens of times less money. So which anomaly should be addressed?