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.

>>35
Templates of templates of templates... → verbose
Classes with weak ctor/op overload → insane implicit casts
Namespaces → using old #include, lol. Also * | c++filt