The best I've tried in DataGrid from
www.componentone.com

It's the upgrade to MS Datagrid. I have a class which does column binding,
search on columns, outlook sorting, Heirarchical data, seek in grid,
combo boxes, column and header right clicking, muliple splits, export to HTML,
print contents of grid.... I've spent a lot of time getting it to work the way I want but now it works pretty awesome.