Hidden gems for the Xbox, sports and others?

[pk500]

Hi all:
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<BR>Sorry to be so Xbox-centric, but hell, it´s the only system I own.
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<BR>I own most of the "heavy hitters" for the Xbox -- Halo, Project Gotham, NFL 2K3, Jet Set Radio Future, Amped -- plus NASCAR Heat and ESPN MLS GameNight soccer.
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<BR>But what gems am I overlooking? Not only the games that the press and the majority of gamers pimp to the high heavens, but what about some hidden jewels? Sports and other genres.
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<BR>Advice, boys?
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<BR>Thanks,
<BR>PK