rosswake, if you like the branching look, are there dark-colored replica branching coral? That way, it's fake so it won't impact your pH and it's got the branching aspect you like.
something like this http://aquarium-supply.biz/products/NI-71A.jpg
That was just the first darker one (not pink or white) that I saw, in a 2 second internet search.
something like this http://aquarium-supply.biz/products/NI-71A.jpg
That was just the first darker one (not pink or white) that I saw, in a 2 second internet search.