A quick gander at Metacritic will show that the Xbox 360 has the most games with a Metacritic Average of 75 and above.
XBOX 360 has 323 games ranked 75 and above
http://www.metacritic.com/games/xbox360/scores/
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PS3 has 226 games ranked 75 and above
http://www.metacritic.com/games/ps3/scores/
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Wii only has 139 games ranked 75 and above
http://www.metacritic.com/games/wii/scores/
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It is clear that true gamers who want the highest quality games should get an XBOX 360
The XBOX 360 is hands down, the best console for gaming this generation....period.