Hello Mac peeps, I am in the market for a new display for my '09 mac pro. I am gravitating, naturally, to the 27" Cinema Display... however I have a few questions for you all: -is it worth the price? What are some serious competitors by other brands? -is it powered off the mini display port? (if not... doncha think it should be?) -when compared to a used 30 Cinema, which would you spring for? Thanks much, r.