I'll try to make it with the following: Denon AH-D7200 headphone Denon AH-D2000 headphone Denon AH-MM440 headphone iFi Micro iDSD Black Label amp Campfire audio Continental V5 portable tube amp

This is what fixed my tennis elbow. https://www.amazon.com/TheraBand-Resistance-Preventing-Tendonitis-Resistances/dp/B014VXSED6

@grizzlybeast you just sold me on the eikon.

I am using the Brainwavz memory foam angled pads with my D2000. They are very comfortable for long listening sessions. Treble was tamed a bit with these pads and I prefer it that way. Bass (sub or otherwise) is still amazing. I am very happy with the pads.

Thanks, TimeLord!   I was indeed down to two choices the Oppo or the Mojo. Decided to go with the Oppo based on the cost. But after your review, cancelled the Oppo order and ordered a Mojo. I do not mind the bigger stack and I assume the Mojo would be future proof too. 

I am looking for a portable setup. I will be using the Alo audio continental v5 as the amp. Source will be a Note 4 Android phone.

How about the DAC section alone? I am planning to use the ha2se as a DAC alone with another dedicated amp. Was wondering if the issues you mentioned were inherent to the DAC or the amp portion.

Ah a little disappointing but I think I'll still get it. Thanks for checking.

Can anyone confirm if the bass boost works when using it as a line out USB DAC?

You should be able to control the E5 via Bluetooth whole being connected by micro USB.

Is this a good idea for a portable setup?   Galaxy Note 4 (marshmallow) -> Alo The Key DAC -> CV5

How does the soundstage and imaging compare between the two? 

How does the soundstage and imaging compare? 

I missed the last one. Not going to miss this! Count me in.   I am ashamed of my gear. So, I am not sure if I will be getting anything.

Count me in! So close to where I live!