I only have experience with the MQ neck, but I love this pickup. I am using it with a Mule bridge and the middle position sound is just amazing, especially after playing a bit with the guitar knobs.
So I can confirm that IMHO a HB/P90 combination is brilliant. I would nonetheless mention as well that having a P90 in the neck I would probably never go back to a HB in this position... Having said that, I think I have just been converted to P90s full stop. If I could build / have someone build my dream guitar, it would have to have 3 P90s!