Not too high for angelfish. Angelfish are surprisingly adaptable. I've kept healthy angelfish in everything ranging from 6.5-8.0 pH. As long as you aren't keeping P. altum, I would not mess with your pH, personally.
when u use ph up or down u have to use it every water change which in turn gives u a big ph swing in your water which is more harmful to your angels and other fish. put a few good pieces of drift wood and some tall plants in there and dont mess with the ph