I am ready to make the jump from a MacBook Pro to a 27inch iMac, 3.5GHz i5, 8GB RAM, 4GB VRAM, and the Fusion drive. I produce video for a living. Not 4K, but 1280x720 for Youtube delivery. I'd like to go SSD, but these are way outside my budget. I run Premier Pro, Photoshop, and other Adobe products. My question is, will this machine cut it for that format? Will the HD be fast enough to feed video without jerks or freezes? Or is this an issue for higher rez video files? In the future I plan to get an SSD external, maybe when the prices drop. Thanks in advance for any advice.