Has anyone had experience with this monitor? I can't really seem to find much on it, not even a video really. Someone is selling one here locally, a 23", for $140. I didn't know it was this type until he told me, since I was looking for the newer old one. (this one) Is there a huge difference? I need it for photo editing, and it seems like I can either get the 23" plastic one for 140, or get a 20" newer old one for 150. What are the big differences really? Is the other a lot better in regards to the screen itself? Thanks.