Price IS an object but Radeon Pro 580x or Radeon Pro Vega 48? Going to purchase a new iMac for my film major daughter who's especially interested in video editing. iMac that I am looking at for her... 27" i9, 8gb ram (which I will upgrade myself) 1TB SSD and either the 580x or Vega 48. I was most interested in the 580x, figuring that just 2 days ago the 580 was a desired GPU and the Vega 48 would cost an additional $400. Moving to the Vega 48 might necessitate my downgrading to the 512gb SDD. Thoughts or advice definitely appreciated.