Hi all, I'm terribly confused about the difference between the 21" iMac and the 27". I purchased the 21" with the fusion drive (1tb) ($1499) but upgrade the processor to the i7 option. I was working with it and it is slow as a dog. I then figured out they had mitigated the fusion drive to 24gb ssd and a 5400 drive. So upgrading the processor was a moot point because the hard drive was so slow. The video card is decent and great processor but the drive was the stopping point. The computer was so much slower than my 1000 13" macbook pro. It had choppy gaming experience and the operating system would pause routinely while doing stuff. The 13" works like butter versus the 21". I'm guessing that the fusion drive with a 5400 disk is just a very bad design decision. Any thoughts? So I returned the 21" and upgraded to the 27". That machine is much better. It's pretty much amazing. I got the ($1999) one and really am happy. BUT I'm really unhappy with the performance of the 21". I felt like they took great components (processor, display, graphics card) and combined with a really bad component (hard drive). Why did they do this? It almost felt like they were trying to force users to the more expensive models. It's really a waste of components capabilities to put that drive (5400rpm) in the machine. Thoughts? Thanks! --- Post Merged, Jul 5, 2017 --- BTW, I will acknowledge that I might of had a bad machine. The geekbench test put the 21" iMac at 18000 on all cores so the processor was definitely working. But my experience working with it for 10 hours was OS slowness (pauses to think) and choppy video during gameplay. Maybe the video card isn't as decent as I thought it was as well.