As suggested by Msmoto, here's another tripod related thread about more expensive/heavy/clever made tripod heads, ball heads, panoramic heads, 2-5-way heads and gimbal heads.
I opened the subjects widely on purpose, because it will happen that for special tasks we could debate of Pro and Con without getting off-topic too soon. And on the other side, it's kind of "not of much common interest". I don't think it will become massive.
First, some links to already existing threads here and of the older forum: