Just a quick update. I did some testing with my Gitzo 2530 and the D3/70-200 combination. I could see a very very slight loss of sharpness with the D3/70-200 mounted on the Gigapan vs my Markins M10 head.
I did some searching and found a factory demo of a Berlebach Uni 16C from a US dealer for half the price of the new one from directly from Berlebach. Total cost with shipping was only $350 which isn't too much higher than what I was hoping to spend on it.
The only downside is that it's camouflage but for 50% savings I can live with it.