Hi! I have an iMac 27" Late 2012 i7, 8GB RAM, Fusion Drive and NVIDIA 680MX, I'm quite satisfied, but I want to understand what margins there are to upgrade. Do you think that replacing the Fusion Drive with only an SSD I can greatly improve the performance by counting the fact of SSD technology more up-to-date than in 2012? Would you do even more, like 16GB RAM? Thanks!