I have been dying to use the new Microsoft Composite Application Block (CAB) in my new architecture. Unfortunately, it's only geared for .NET 2.0.
While browsing the CAB forums, I came upon this thread:
It seems that the DevExpress suite of controls has a pretty enthusiatic following. I have only used Infragistics and Syncfusion in applications that I have architected. Looks like I will have to check out DevExpress as well.