Im getting the new iMac, but i am stuck on which one! Im looking at the base with 512gb SSD or the middle tier with 256gb ssd. budget is maxed out at 2k. No room for wiggle. I am a content creator (Photoshop, Lightroom, Premiere, After Effects, PhotoMechanic, FCPX, etc...) This machine will be solely for editing. I have an external Raid 0 (USB3 drive that is my main drive) and another 500gb thunderbolt SSD Gtech drive for editing too... Thoughts? I Guess the bulk of my question is in the difference between the 570 and the 575 (1Tflop difference) will I see enough of a difference in the two? I wish I could get the 580, but it would mean getting a fusion drive and I do NOT want spinning disk.