Bose has been trading on its "style" and advertising for over a decade.
They don't sound great for music at all, although they're better than they were, and they're okay for surround sound.
You basically have to decide whether you want a surround sound system in one box (like Bose) that will probably do a middle to poor job of playing music, or build a stereo system around an amplifier and some proper stereo speakers. those "everyox" systems usually sound rubbish for music and aren't easy to upgrade. I would stay clear.
A good brand surround sound receiver will do pretty well for stereo as well. Yamaha's RX-A850, for example, got very good reviews by WhatHifi, but there are others to consider.
As your room is only 30m2, you don't need a powerful system, and anything more than 7.1 would be overkill.
So I would suggest starting out with a 7.1 surround sound receiver in the 500 to 750 Euro range, some good bookshelf speakers (Monitor Audio Bronze, for example, 300 to 500 Euros), a modest subwoofer (200 to 300 Euros) and a good BluRay player (which will also play CDs) (100 Euros), then add small bookshelf speakers and a center speaker, which you can always buy used on EBay for about 50 Euros each.
Leave some spare money for speaker stands, speaker cables, and decent HDMI cables.