If the IE800, K3003, etc didn't do it for you, I'm afraid one of your parents listened to the SR-007 or SR-009 while you were yet in the womb. You'll just have to go straight to that route.
In all seriousness, try to head to the next head-fi meet in your area to audition gear first.
The GR07 actually goes slightly deeper. I've felt it move air at 10hz with sinegen. If it's sub-bass you want, the MH1C gives that in spades while keeping the mids clearer than the FXZ-100's. Here:
It may/may not apply to the z200, but take from it what you can.
Oh, and the review was done with the MKII, so the bass edition may be better suited to your tastes.
Lol I won't take that as an insult. I guess some other people who commented on the difference between top universals and $1k customs also have that problem. They said 10% difference. I would say 10% - 20% difference too if I didn't EQ
And that's FXZ100 comparison, I haven't seen reviews comparing FXZ200 and GR07 BE.