I want to get a new M3 iMac with a 1TB har drive. However, there would be like a week or so delay if I added extra hard drive. Do you think I should just get the 512GB hard drive model that’s available now with 16GB of memory or should I wait a week to 10 days to get 1 TB model? I have 2 external hard drives that equal 2TB already that I could use for storage. I’m a photographer and love to take photos of wildlife and nature. I only do it as a hobby and not as a business. I wanted to get the computer before or around Christmas but if I up the hard drive to 1TB there is a delay.