Hi, I am thinking of getting a Mac Mini, since I have an unused Thunderbolt display at home and my Macbook is not powerful enough for some tasks. I will be using the Mac mini for Lightroom, Photoshop and iMovie (and eventually Final Cut), so which configuration should I go for? i5 vs i7? 8GB vs 16GB? 1TB Fusion or 256 GB SSD? Thanks in advance!