Buying Speakers.

[AronE.]

Ok, so the thing is, we don't have speakers in our classroom in school and I decided to buy some random ones that will just do the work. I gathered money from my classmates (I gave too) and now I have to buy speakers. But, I don't know which setup is the best for a room this big, big enough to fit about 25 people... I read that 2.1 is the right setup for this situation, but also should be done in an exact, proper way (probably the setting up, idk)... I know how to choose motherboards, CPUs, GPUs, monitors etc., but never really bothered to check anything in details about speakers... Can some1 help me?

[superLED]

Just buy a headset and pass it along.

Jk. Any cheap 2.1 would be powerful enough to fill a room with over 20 people.
I have a set of cheap tabletop Creative speakers (with 1 small sub), and it can get really, really loud.
Quality is not the best, but would work wonders in a classroom.

[AronE.]

We chose this one. Is it good?

http://www.emag.bg/tonkoloni-serioux-2- ... ECT0NBBBM/

Setup: 2.1
Power RMS (W): 16
Frequency: 40 - 20000 Hz
Satellites(???): 2
Power of the satellites(???) RMS (W): 3
Amplifier : Integrated
Type of speakers: MultiMedia speakers
Subwoofer: 10W
Remote control: No

Edit: Also, is there something about ports I should be aware of?