I have 21" on my desktop. It fits my needs and the design is not too big for my desktop with papers, books, etc. However, when I bring iMac for showing photo album to my extended family, 21" is so small to watch together with few people.
All in all, 21" might fit for working (assuming you are not too old), while 27" is better if you plan to watch with few people on iMac.
I used to work in 27" few times. A bit too big for me. But the reason I choose 21" is I got very good price and it still fits my needs.
All in all, 21" might fit for working (assuming you are not too old), while 27" is better if you plan to watch with few people on iMac.
I used to work in 27" few times. A bit too big for me. But the reason I choose 21" is I got very good price and it still fits my needs.