Choosing the best sound system can be challenging some time or at times.As now many of the best companies or brand have come up with newer technologies and various models.now As a Musician myself, I would like to prefer a good set of system 1) Which are AFFORDABLE at good price(because there is no meaning of buying professional or costly system when you can get the same sound quality for less price and you can upgrade your system in future.so save your money), 2) Pick up the system which you NEED, 3) CHECK or TEST your sound system when you buy it(do test your system properly when you are about to buy it.check for the distortion in your system and if its distorting you know its not a good one and also do for the woofer or the bass speaker, if it sounds flat or the bass bursts then its not a good one)
Hope this tips might help you for your Sound System Shopping.:)
Enjoy.:)