I am thinking of purchasing the same set up as Ryan mentioned above, except with only 16GB of RAM, but the 4GB AMD GFX card. I need to run Premiere, After EFX, Divinci Lite, and Media Composer. Apple told me Flash drive would perform faster. I see you purchased with 1 TB Fusion Drive.
I will use mostly external storage for media. Anyone know if this is correct. Would purchase the 512GB Flash Storage.