Okay, I just did the mod. Not being able to hear it back to back with myself, I had to do a back to back with the X1.
I must say, the bass is significantly more present, yet without feeling overpowering. The X1 feels even... deeper and more expansive, but the Q's have a little more... control and tact? I don't feel like the bass is basically non-existent when I compare the two anymore.
Overall, I'm pretty pleased. I suspect I may be selling off the X1 and keeping the Q701 for a while. Heck, I may even just get those Annie pads to see how they are since the X1 will free up some budget.
Also, it's pretty clear from listening back to back that the Q could use some amping. I'll probably just pull the trigger on something cheap and reliable like a used C5 or E12 to start with and go from there. Having a starting point for comparison seems to make the shopping/decision-making go smoother.