Many people are perfectly happy with a simple compact set and that is fine.
But for those for you who intend to purchase something more sophisticated, please read on. When you find that you are overwhelmed with complicated controls which seem to take a doctorate in order to read the instruction book. Someone once told me that if an instruction book takes longer than Mahler's 2nd to read - forget it. As a matter of fact buying a system is in itself a bit unsettling. Add to this the cocktail of tweeters and woofers and it makes you think you're in a pet shop as well.