Good-looking Java Swing Look&Feel?

Question

I'm working on an open-source Java Web Start application, and I'd like to give it a consistent theme across platforms. Metal is totally ugly, and I'm not particularly happy with Substance (esp. performance). What are the best Swing Look&Feel options out there today?

Answer 1

I like the 'Nimbus Look&Feel'(2nd image) introduced in Java 6 Update 10 very much and it is contained in SUN's vanilla J2SE of J6u10 and later by default!

Another advantage is, that it is painted entirely using Java 2d which makes it fast and rederable at all resolutions.