The only bad thing is that it is expensive. The good is that it is the best all-in-one computer you can buy.
iMac 27" far and away.
It is a good size for a computer monitor but you can buy a 27".
imac 27 inch, macbook pro, and macbook air.
It is not possible to convert a DVD into an iMac.
21.5" or 27" Aluminum.
Apple no longer sells a 20" iMac. They sell a 21.5" and 27" iMac. Both come in aluminum.
There is no 24" iMac for sale new. Your choices are 21.5" or 27".
As of this writing, the 3.5 GHz 27-inch iMac (with a 5K display) retails for $2,499 USD.
The 27 inch iMac is 20.4 inches (51.7 cm) tall and the 21.5 inch iMac is 17.75 inches (45.1 cm) tall.
I do not have a 24" iMac. I have a 20" iMac. Apple no longer sells the 24" iMac. If you will click the Apple logo on the top left of your screen and then click About This Mac then More Info you can find the answer.
21 pounds
Yes, with no problem.