The "once and forever question" when it comes to computers and cameras! Wish I knew.
In the meantime, you'll love the 30 if you buy it. We have a couple that we use to display portfolios for clients, and they are stunning. It's worth buying a pivot base so you can easily swing the monitor from horizontal to vertical with the layout of the photo. After viewing horizontals full screen, it feels really crimped to view the verticals along the narrow margin of the monitor.