Right, as a start Edifier is good as well.
For lifetime you, really encourage good really good ones, won't regret.

Really, Electricals like speakers last for life?

Subwoofer very expensive, ~RM2k 1x w/ built in amplifier & I'm not sure neutral frequency response anot for that one.

Just curious, what speakers are you using for life now?

ya... lower bass, longer wavelength, bigger room required
if not, before a single wavelength is formed, already bounce back from the wall

"Also, bass notes have a long wavelength, some exceeding 20 feet, so a 25hz note might not even create a single wavelength before it bounces off the rear wall and back on to itself." from some audio forum

fark although studying physics too but i also abit blur on this matter la.... but u prolly wont even listen down to 20+hz pun
usually 40 hz liddat nia

I am studying Physics as well. Very stressful subject. Sleepless nights while studying.
Physics is everywhere in our lives. My ears cannot detect nice sound.     

I don't have golden ears. I hear sound nice enough.
Headache to choose between Soundbar and Bookshelf.
Soundbar can connect through HDMI and USB. Bookshelf opposite but better sound.
Need to find USB Player to play USB music if don't want to use Bluetooth, afraid drain battery and etc.

A few months. Switched from Sennheiser HD800S headphones to Edifier. Spent only a fraction of the headphones cost. Speakers > headphones. Headphones harm the ears and cause tinnitus eventually.

Consumers paying way too much premium price to western technology companies.