I think mine would have to be:

1. Williams Defender
2. Pacman
3. Atari Battlezone
4. Atari TX1 (I think that was its name - sit down Pole Position style racer, with 3 monitors giving a wide field of view)
5. Galaxian

I would love to get a coin-op cabinet for my spare room, but can't justify the cash right now... maybe some day...
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Geoff
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Mk1 Blue - was 4GB, now 16GB
Mk2 Red - was 12GB, now 60GB