Hello, I have a 2010 Macbook Pro and will hold onto it as long as it stays alive, but I imagine I'll have to replace it with a new one in 2018. I use it for photography editing (using Affinity Photo). It's getting more and more difficult for me to use the laptop for editing, so I want to buy an external monitor. Nothing too big or expensive, probably up to 24" and less than $300 or 400 USD (just ballpark as I use different currency). Any recommendations on what to look for as far as compatibility with my current and future MB Pro? And possibly any specific models? Thanks!