Dear Pankaj,
I'm glad that you liked the speakers, For music usage: Swan D1080-IV is an amazing set of speaker and it can give old audio engine A5 a run for their money. You need to listen to it to believe it. Not sure about the new A5+. The sub-woofer of Swan M20W is a sealed enclosure sub and it won't give you voluminous low frequency output but it will give you tight bass.
The main problem is we are selling swan speakers and about 1-2% people have reviewed them so far. We think that people should review them so it will be beneficial for the other people to make the right decision. On the internet, reviews are the only sole factor in buying anything especially speakers but then also we have provided HiFiNage's Gratification Assurance so that customer should be confident enough when buying a particular speaker.