My monitor is a 27″ Samsung S27A350H which offers an HDMI and VGA input. However, in making this change to HDMI I encountered a few problems. The extra features an Apple Cinema Display offer are nice, but I can live without them. My eye (even with glasses on) can’t tell much of a difference between an Apple Cinema Display and a Samsung. Samsung Monitors are very high quality and a fraction of the price. I have used Samsung Monitors for a few years now since selling my 30″ Apple Cinema Display before they were discontinued.
I recently started using my Samsung Monitor through an HDMI connection rather than DVI.