Its really about system and speaker matching. I haven't heard Decware amps but they are meant for high efficiency speakers. Basically, 93db and higher. Your class D amp has more than enough power for really any speaker. Also, watts per channel is one of the most misleading metrics in audio. I learned this years ago because I had solid state amps running 100+ wpc and up to 250 wpc. Then I heard a 30wpc Primaluna tube amp and my jaw dropped. The bass was so much more impactful and the sound was just better in every regard. I've tried other solid state amps since including class D, but haven't liked any enough to own long term. However, everyone has their own taste as to what sounds good. Some like detail, some like bass and dynamics, some like musicality, tone, imaging, etc. Tube amps produce even order harmonic distortion. Some like that sound, some don't. I find it addictive, as do others who've heard it. However, I suggest you listen for yourself. Try not to get caught up on the watts. If you have 10 wpc and a 90db sensitive speaker, and an average listening space, you have plenty of power.