A good third language?

Okay, my main two languages are Ruby and C++. Although I've learned Ada out of school and I'm learning Scheme in school now, I don't consider them languages I'm generally GOOD with. So I'm wondering what third language I could learn to balance myself out.

>>23
Never had to deal with the X windowing system, but I heard it was a bitch.

>>22
GTK and QT actually make a lot more sense than what Microsoft uses  (WPF/Windows Presentation Foundation) which was a lot more convoluted but was refreshing to learn.  WPF was the only framework where I had to actually read a book to understand.  GTK and QT, you can just start programming in without any experience and without reading anything.