Right now I'm running an Acer 24" H243 on a Sapphire HD 5830 using HDMI. And I actually think I'll be requiring to do an IT setup for school purposes (Business/IT major) when I start back full time next summer.
I'm thinking of upgrading to the Flex 6870 or waiting to upgrade to the 78-- series. What I've been told is that for an Eyefinity setup to have maximum functionality that all displays have to be exactly the same. The Acer I was using before I got the 42" Vizio is the monitor I'm currently using on this setup and I have a dual 19" monitor setup from a previous build - but one of those displays has a dead pixel, and neither monitor has an HDMI port. I think I want to do 3 monitors in HDMI using the Flex video card, but will I need to have all displays exactly the same or will I be able to mix and match displays as long as they all have the full 1080p resolution? Can someone recommend a good display setup if I don't?
You see some folks using a larger center screen and two smaller side screens. Personally I think all three matching screens is the best way to go as it allows for the best bezel management.
I have three matching 24" Asus screens, the center screen slightly overlaps the side screen's bezels thus making them seem a lot thinner as it hides the side screens' inside bezels behind the center screen's, it also aligned the image much better.