I only have experience of Triax and Gibertini dishes. My Triax 88cm dish was well constructed and performed excellently. If it had a fault, the dish elevation adjustment is difficult to align finely due to Triax's own peculiar clamp and slide arrangement. The Gibertini 1M XP, was even better engineered, performed really well and I had no significant problems setting it up.
You mght want to add a Laminas dish to your list. I'm very impressed by the performance of my Laminas 1.2M and due to it's light weight construction I can run it on a diseq motor. They are constructed in Poland, perhaps this would be an advantage to you for delivery?