Yonith, I come from a computer background too, but the metrics used to measure speakers are a bit different. There is also a subjective element, since different people prefer different kinds of sound. One thing to look at is off-axis frequency response, this is kind of like "how even the speaker sounds as you walk away from the direction its pointed in". This is important because much of what you actually hear in your room is reflected sound, not direct sound from the speaker, and a lot of the reflected sound will sound like is going to be the speaker's sound outside of it "aim" or vector, ie off-axis response. Here is a typical measurements for off-axis frequency response:
The blue line is right on axis, the green line might be fifteen or thirty degrees aff-axis, and the red line is probably fourty-five or sixty degrees off-axis. This is a simple chart and didn't label the axis measurements. Here is one that is labeled:
Obviously the further you go aff-axis, the worse the speaker sounds, but the better it can maintain a flat frequency response, the more accurate it will end up sounding in your room.
Here is an example of poor off-axis frequency response, you can see how mangled the frequency response becomes as you move away from the speaker's 'vector':
Here is an example of good off-axis performance, note how similar the response is at thirty degrees to zero degrees. Also not that this chart does not measure out all the way out to sixty degrees like the above chart. At sixty it won't be as good as thirty, but it's likely to be a lot better than the above measurement:
There are other ways to measure speakers, like impulse response, step response, group delay, spectral decay, etc, but frequency response is arguably the most elemental metric of a speaker's performance.
As for the Hsu brand, it is a manufacture direct brand, so you won't see it at stores. They are good speakers, although I don't think there are any review measurements of them anywhere. I have some myself. I also have the Infinity Primus speakers, which do very well in -off-axis frequency response, especially for the price. The Hsu sub is killer, you will have a hard time doing better for the money for a subwoofer.