I'm sure there are a million monitor threads here so sorry for starting another.
I have a mid 2010 27" iMac that I use for work and I need to add a second screen due to some new systems.
I also do about 50% of my editing on this computer the other half I do on my current model macbook pro 15".
I may as well get something that will be great for photo editing that I can have permanently set up as a dual monitor system with the ability to plug my laptop in when needed.
Let me know what I should get and why. Happy to spend up to $1000, more if needed.

