Panny Pro Plasma model questions for client monitor

I recommended the TH-50PF11UK 50" 1080p 2 million pixels and 30k contrast. But it looks like the room will need something larger, so I'm looking at the 2 58" models; the TH-58PH10UKA only has 10k contrast and 1366x768 resolution. The TH-58PF12UK has 40k contrast and full 1080p native. Neither have 2 million pixels, and I don't think they have the anti-reflective connection. I don't need the HD-SDI board swap options for this application.

I think real 10k contrast is probably fine, but I'd like opinions on the differences between these two models. Are they both as accurate with colors as the TH-50PF11UK, and do they offer the same controls for getting the screen accurately calibrated? Also, is the TH-50PF11UK really that much better of an image than the TH-58PF12UK?