Neroon: I really like the look and feel of Gitzo's heads but the lack of arca-swiss plates is a killer for me. The head I have used for the last 6 years is an Acratech Ultimate. It is simply amazing, locks in place, is compact and extremely light. I can not more highly recommend them. The company also has excellent customer service.
I purchased the Extension plate for my Gitzo ball head and works great for Panoramas. Is this the kind of plate you are needing?
The best is Gitzo series ball heads, they are many times better than any of this junk.
Pretty average looking shots