After speaking to Peter Ward (ATS) yesterday and discussing GEM mounts l have deceided to order a HGM Titan, if available it should be here in around 3 weeks, carrying capacity 45kg.
Approx 2.5 years ago, it cost me A$12.5k landed. The dollar is stronger now, but I still wouldn't expect much change from A$12k. Its not a lot of money in the grand scheme of things... certainly when you're talking high end equipment. IMO, The Titan is worth every cent. A very capable mount.