Mac Air 11" or Mac Air 13" or Retina Mac Pro 13" or 15"?

I have iMac 27", ipad 4th 34GB, but need to replace my current MacPro 11" (too many issues). I like to travel, take my laptop to work (realtor-part time), surf the net, email, photoshop, write, but no gaming. However, because of my health condition, I am spending more time in bed now, but hopefully I will get better. So what do you recommend?

Mac

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