I ordered the 27" with the i7, 16GB, 1 TB Fusion, and the 680MX. Still not sure as to whether I made the right choice. I wanted to future proof my machine as much as possible, but don't really feel like I need the screen size of the 27". I knows it's going to be a beast but I really think I would've been just as happy with the 21.5". I also think the 21.5" would've been suitable for my gaming needs (that's why I went with the 27" because of the 680MX but don't really think I need it). I'm gonna see what 21.5" looks like in store and may decide to get it instead of the 27". Why did some of you opt for the 21.5" in the end instead of with the 27"? Damn I'm just confused!