I really like Telerick. They do seem to have a good system of widgets and data bindings. I haven't used them in anger though so don't really know for sure. I

I really like Telerick. They do seem to have a good system of widgets and data bindings. I haven't used them in anger though so don't really know for sure. I was pretty bummed they removed the grid from the open-source components though. That's the main thing that's stopped me from going further in evaluating them