I shoot with a Trophy Ridge Alpha V5 and love it! Super bright and I like the inline pins. If I was going to try a new sight it would be the apex bone collector.
I shoot a spott hogg right-on with 5 pins. It would be a very good choice in that the pins can gap very close together and with the Z7 you will need that. Other wise I like a single pin HHA.
i had an HHA on my Z7. loved it... now i have an x force GX and the HHA is still there. i'm shooting over 320 fps so i set my pin on 30 and never move it.
I just recently purchased a sabo sight by tactical archeries you can check it on utube. This thing is amazing it totally does away with the peep sight, it is deadly accurate, and will show you if your bow torking or not. I love it and highly recommend.