Whats this best language for complex GUIs?

I want something with a real "wow" factor right out of the box. What would you recommend?

The language doesnt matter, its the toolkit you use that matters. wxWidgets is probably the most popular cross-platform toolkit. I recommend pythoncard as a graphical workspace for making wxpython GUIs. CodeBlocks and wxDev-C++ are two C/C++ IDEs that have a graphical workspace for designing wxWidgets GUIs.

Use GLADE for GTK

Nokia has dropped the ball with QT so dont expect anything good to come out of that