(Original post by ЯOЯЯIM)
I worked as a typist for about a year and that somewhat necessitated a mechanical keyboard. After some time I noticed less stiffness in my fingers after a day's work and I found it easier to exceed my previous average of 80-85wpm without making mistakes. Depending on the switches you use, however, the noise level can increase rather sharply.
However, as you pointed out, the price does jump up by £80 and that's a low estimate. If you're prepared to fork out that much, you'll want to splash out on the best switches and configuration for your needs, potentially putting the price up to £120. Generally, I would recommend mechanical keyboards to people who type swiftly and on a regular basis; examples of such people would be computer programmers, typists/audio transcribers and people who play fast-paced, hot-key intensive video games like Starcraft. People who should not necessarily consider spending £80-£120 on a keyboard are students who do not type up lengthy essays daily
and who do not play video games.
Though I've used IBM, Das and Leopold keyboards and have no major complaints, the manufacturer I would recommend is Filco--simply because they're very easy to find and the quality is excellent. Among my peers, I've seen fewer complaints about Filco keyboards than with other manufacturers. You'll need to think about the switches next. If you're set upon having a mechanical keyboard, you would do well to consult this guide on mechanical switches
bearing in mind that your housemates may not appreciate louder keyboards.
I will also add that buying a backlit keyboard strikes me as fairly pointless in practical terms--if you type fast enough and regularly enough to necessitate a mechanical keyboard, you're going to know how to touch-type, and if you can touch-type, you don't need to see the keys in the dark.
If you like
backlit keyboards aesthetically, do whatever you want. You may also like to look into buying custom-colour keys and replacing the industry standard ones. You can create patterns or just a pleasant colour scheme.
Finally, avoid manufacturers like Razer or anything geared towards "gamers" as these keyboards tend to be overpriced for what they are.