I cannot recommend any of the two as none of them is a high performance accurate speaker. If you are looking for accuracy, you need to look further. If you want a particular coloured sound, only you can decide what sounds good to your taste. I also have no idea how the Gryphon will work with them. Cremonas have a more classic finish, fact 8 have modern sleek styling, as you know.
I cannot recommend any of the two as none of them is a high performance accurate speaker. If you are looking for accuracy, you need to look further. If you want a particular coloured sound, only you can decide what sounds good to your taste. I also have no idea how the Gryphon will work with them. Cremonas have a more classic finish, fact 8 have modern sleek styling, as you know.
System here http://www.whathifi.com/forum/your-system/my-dream-system-oh-maybe-one-day