HI Chris
Yes this subwoofer looks lovely..It is just 9 kg..I have Paradigm Reference Studio 100..these speakers have enough bass ..what I need is the bass extension down to 20 hz..I don't want a powerful subwoofer..I want something extremely musical..so MJ subwoofers,the P50 looks like a good solution but I am still worried if a subwoofer would blend seamlessly with my main speakers..that is the main issue..If I were 100 % sure I would buy them tomorrow..but I also saw a guy's system on the net..he was using a subwoofer with Wilson X-1..can you believe it??and he was happy with the sound..
with REL ;the Q series are for HT..I would not use them for music..they are small and compact but they are mainly for HT..they tell so on their website.