The Nuon technology, the evolution of Project X, was a brilliant idea that unfortunately failed to catch on, though a few DVD players sporting it were actually released. Nuon, you see, something the great and hairy Jeff Minter had worked on, added a ton of features to the average DVD player (zoom-in, audio-visualizers among other stuff), while also turning it into a powerful games console; a console that would actually play the best version of Tempest ever released.
The Nuon is sadly hard to find in this time and age, and I thus wholeheartedly suggest you have a look at this Samsung DVD-N501 Nuon auction. The thing seems to be in great condition and the seller is kind enough to ship worldwide. Mind you, the DVD-N501 was one of the two models released in North America. Oh, and should you grab it, do give Tempest 3000 a search.