I'm using 2mp40qd and a xf150 in my 195g
The gyre works pretty well since it provides long stream of laminar flow, and when it clashes with one of my mp40s it creates a lot of turbulent flow.
What I dislike about the xf150 is how noisy it gets on pulse mode after 40%, my qds are much more quiet than the xf150 even at 100%.
I also dislike the lack of controllability with the xf150.
Other than what I mentioned above, I don't have any real complaints since the gyre is working really well with my 2mp40s.
I have zero dead spots and don't need to max out any of my pumps so far.