I have been looking for a .NET UI suite for some time. Some people suggested Infragistics. For me, I have found the package from DevExpress to be the best one of all. I am particularly impressed by the printing components. Those of you who struggled with printing in Visual Studio 2003 understand the importance of an easy-to-use printing suite. Although GDI+ is beautiful in theory, it does take some getting use to.
There are some many cool things about this suite. I don't know where to start. Most impressive is their implementation of the Office 2007 interface. Not only is it faithful to the appearance and implementation details of the ribbon, the performance is superb. This product will definitely add years to your peace of mind.
Check it out at http://www.devexpress.com/
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