I've bought two in the last 18 months. A Xerox 19 inch glass fronted with digital input. Very nice but not super bright, and a bit reflective if there is light behind you.
An Acer AL1922, which is very nice tho not glass fronted, bright and good colours.
A little before that I bought an AG Neovo for a writer friend, also with digital input, also 19 inch. Very nice indeed. This was very cost effective at the time, and he's been very pleased with it to write on. Very bright indeed - we turned it down quite a bit.
Don't know about current Apple models, but my neighbour has a PPC iMac and the screen on that is bigger, but certainly no better in quality than any of these.
The only one to have any dead pixels was the Neovo, and its barely noticeable. The first Xerox died after a few months but was promptly replaced under warranty and the replacement is fine.
Of the three I would most recommend the Acer. The Xerox looks nicest, with a sort of oval heavy metal foot. I have noticed no difference at all between digital and analogue modes.
Don't know whether many people really need 23 inch screens. I usually tell friends considering larger than 19 inch screens to get two and run them side by side and put the savings into the card. Maybe two 17 inch ones would be an option also.
Be interested to hear what you end up with.
Peter