stickywicket21 wrote:Is the refresh rate too limiting to use this as an extended monitor?
The refresh rate itself isn't. 60hz is standard in computer monitors, but the stats that you're concerned about on a normal PC monitor are response time and input lag. Response time is the time it takes to change a pixel from black to white to black or from a color to grey and back. TV's don't typically list this stat. For normal desktop use, you shouldn't really have a problem, but if you want to use it to game on you need to know the response time and input lag. There are several sites that test and track input lag on TV's.
you can start here:
THis particular model isn't listed, but it's an IPS screen and LG's IPS models are typically pretty good.