You're absolutely right! I was looking for an editable grid in all of these kits and the best one was in extjs: http://extjs.com/deploy/dev/examples/grid/edit-grid.html

The only other decent grid editor I know is: http://trirand.com/jqgrid/jqgrid.html

Also missing from this list is the http://ui.jquery.com/

ExtJS is pretty good, but it's not as awesome as it might appear at first. As soon as you try to step outside the its features you're in for some adventures. For example IIRC there is no way to reorder tabs.