Hi Martin,
The "Edifier S350DB 2.1" is undoubtedly a very good speaker system.
But please keep in mind that these speakers are Hi-Fi / Multimedia speakers that are built to sound "pleasant". They are not Studio Monitor speakers (built to deliver the most "honest" sound possible). If you mix your music with hi-fi / multimedia speakers, there is a risk that the music will not sound as expected on other speakers (because, for example, you may be boosting certain frequencies that you only heard weakly through hi-fi speakers too much in the mix or, conversely, you may cut bass or treble frequencies too much).
Best regards,
Chris