If you use Growl, you might find it a bit overkill to have some notifications come through Growl and others to Notification Center. Mountain Growl pipes notifications from Growl to Notification Center, but there is one caveat: all these notifications will have the Growl icon, and not the icon of the application that sent the notification.
This is just a stop-gap, as Growl 2, to be released soon, will support Notification Center directly, but in the meantime, you might find this a useful solution to group all notifications in one place.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20120829001414378