I don’t know if others’ opinions can be of very much help beyond the general things, with acoustic treatments it is always dependent on the holy trinity of room, system, ears. What works in one room may not work in others. I’d talk to the Vicoustics people, they have a consulting service.
One thing is for sure, Vicoustics are on the more expensive side but they look nice. The GIK stuff is less costly but traditionally less nice-looking. However they have added new models more in the Vicoustics style, worth having a look. They offer a free consulting service as well.
You will find a wealth of info in