Update: I am informed that the Matrox G400 resolution issue was due to a mis-configuration of the card in Win2000. The guy with the card tells me he found and fixed the misconfiguration and is now getting high resolutions. When properly configured, resolution of 2560x1024 over two monitors is no problem.
Link to recent G450 review: http://www.gotapex.com/reviews.php?rev=matrox/index.html
Link to recent G450 review: http://www.gotapex.com/reviews.php?rev=matrox/index.html