15.4" Nice clarity at that size.
Everything else compared to it looks like crap.
Though I use 23" 1920x1080 (93 ppi) on the external VGA port. I still like the 15.4" 1680x1050 (128 ppi) for the density, it is nice.
I mean crap the PPI is dropping these days because everyone wants *SIZE*... not Size with Density.
Plus who want to watch up-scaled video (1080p to 2160p or 4320p) It just looks likr crap compared to a 1080p display.