I am sorry, but I don't think a super tall ever looks tacky. I know by definition it isn't(or maybe it is, I am too lazy to look up its height) a supertall, but Devon Tower in Oklahoma City does not look tacky, at all. It might look a little out of place, but it looks freaking awesome compared to the rest of the skyline, its not like a 1,000 ft tower in Pflugerville.
Austin's skyline is plenty filled-out and has enough height to look amazing with a 700-1,000 ft tower.
And if any person on here saw that a 1,000 ft tower was being constructed in Austin and were....eh....about it, I would die in astonishment. It would look bad ass and all ya'll know that