Hi guys, I'm wondering how you could tell when your unit was manufactured. My concern is buying one that's from 2006 or 2007. Is Apple still manufacturing these? I'm looking to buy the 30" which may sit on the shelves longer than their 23" being that is the most popular size. Any way of telling when one was made without opening it? Any chance of the older models before the contrast upgrade is still in the distribution chain? Best bet is getting it from the Apple store to avoid old stock.