For me, 3rd party widgets are to be avoided wholesale.
I know you agree in principle. Seperation of Concerns could even be used to justify no 3rd party components... Vendors just want income.
CASE tools in particular never seem to work well enough to commit to use, in my experience. Sounds like XAF is a CASE-like "EASY button" sales offering, and blah-blah-woof-woof.
Spinning one's own T4 templates or code snippits for the likes of the storied functionality-shoe-box is the expensive but reliable route to go.
Cheers! sysrpl EDIT: yes, I did look at it last year - blech!