I will comment on the 19" Planar. I had a Planar PL-191 monitor about a month ago. I play games so I wanted no ghosting. The monitor ghosted, but not as bad as some other LCDs that I have seen. The occasional gamer would like the PL-191.
I returned my 19" Planar becuase after 3 days it started sprouting dead pixels. It had no dead pixels when I got it, but it got 3 bad pixels after 4 days, not good!
I instead bought a PX171, the 17" LCD with the 16ms response time. I am very impressed with this monitor! Zero ghosting, no dead pixels, I'm very happy!
Be careful with the PL190, the PX191 would be a decent monitor, but you won't see it for $488 like the PL190 model.
Size doesn't mean everything in this case