you'll get BT and wifi on E30 easily by hacking a cheap Raspberry PI + a spdif-hat and feed its spdif into E30. Btw, why not wifi on D90 and DACS in general? About, base boost, 3D effects and other goodies: I am an fun-lowing audio-lover with almost no knowledge in audio tech, who doesn't understand why such funcs may have an impact on audio performance when they are switched off. What is your opinion about
IFIs Drop ZEN CAN 6xx, a fun-fun magic box with two buttons, one that rotate-shifts the low end upwards and some fraction of the high end slightly upwards to compensate for the shortcomings of phones with weak base and small dips in its treble, and another button with 3D effects. My M500 has MQA and IFI puts MQA in all their dacs

but Topping only has it on their flagship D90. Will there be MQAs on future dacs from Toppings? What I am looking for> cute colorful amp to connect with M500 for my incoming Argon mkIII at home, a new cute red DAC/AMP combo or stack for my office and a portable dac/amp to replace my Oppo HA-2SE -- with fun buttons and MQA. I am very thankful for all your help guys