Leaning towards the Audio Technica ATH-M50x pair so far, for closed back.
If you like the Q701 I would shy far away from the ATH-M50x. They have hardly any soundstage and a V shaped sound signature. I've listened to them, and they do in fact touch your ears.
The M70x is neutral and accurate, albeit maybe a bit bright, but my real recommendation is still the Mr Speakers Mad Dog. They are known for having an out of head sound stage in the closed headphone that they are. I think they would fit your needs perfectly.
With and without these slight +1 to +4 decibel tweaks on the lower frequencies I also seem to find certain sounds and effects drown out other sounds and effects and make them harder to hear. On my gaming headset I never noticed this, because I'm pretty sure they don't have this problem. What do you think is up with the AKG cans? Could they just be seemingly inferior in these drowning out qualities without the aid of additional equipment or is a $40 cheap gaming headset getting the better of my cans for letting me hear all sounds in musical architecture equally without drowning each other out? I will admit hands down the quality of the sound is far superior on the cans but yeah I guess you could say I'm tuning in to more potential flaws in comparison to what I've been used to for a long time?
You are using an equalizer to increase bass frequency response. You are going to drown out mid-range elements in your music, it is just inevitable. Digital Equalization always, always loses some of or a significant portion of your music.
Here is what's up with your situation:
-the most major factor of you not getting the bass response you desire is the fact that you are not amping the Q701s. I used to own the K712 Pro, and when I tried it directly out of my phone, just for kicks and giggles, it had literally no bass response that I could discern. When I hooked it up to an Objective2, suddenly all the bass response it was lacking was there. Amping your headphones is very important.
-another major factor is that all (and I mean ALL) realtek audio chipsets in motherboards roll off bass frequencies.
Both of those things will be rectified when you plug in your Modi2/Magni2 stack, so I would wait until you have your dac/amp setup before you think anything is wrong with your headphones. You really have no idea what they sound like yet if you haven't amped them yet haha