The trade off in leverage/performance is that you need to use a lower gear for the same gear ratio. If you are running standard cranks, you might consider compact, or you might need a wider range cassette. You can do the math with any gear calculator you find online.
I don't think there is just one "perfect fit" for each person, mine has changed quite a bit over the years of changing fitness and a variety of injuries. When I switched from 170 to 165 my bars went lower and further forward and my seat went higher and further forward. I also stopped having hip pain, which is what made me chime in on this thread.
Sounds like you might need to try some other saddles, too.
Good luck, I hope you find a way to ride without pain.