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I ended up buying it.
Image quality is great, colours are great. It's slightly uneven, but it's minimal, esp when warm. Only downside is that it goes black for a split second about once every hour. Odd, but apparently it's been doing it for a few years. For £125 incl the thunderbolt adapter I'm not complaining.
Also, getting something you've been lusting for for over 10 years feels pretty damn good.
Apple cinema displays are dodgy with anything but the correct gen products.