Need a Mapping Software Recommendation other then MapPoint

I've been asked to look into alternatives to MapPoint because of some apparent limitations.  So we're after mapping software which, like MapPoint, can pull in spreadsheet data and convert the data to visual, geographical representations on US maps.  This is for marketing purposes of course.  Thanks.
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Reid PalmeiraTelecom EngineerCommented:
ESRI is probably one of, if not the top for GIS software.
ArcGIS may be overkill depending on what exactly you're tryig to do.

JUMP GIS is nice if you're developing in Java. Fairly easy to use.

See also:
LTWadminAuthor Commented:
scrath: The hit the mark as did the esri solution from rpal.  Thanks to U both.
Yes I thought the compare would be good, too few of them on the net.  Glad it helped.
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