Which should I pick?

I can only pick one for my next semester.

Functional programming using Haskell or logic programming. I've already read SICP and it pretty much covered everything that functional programming course is supposed to teach.

What Would The Sussman Do?

>>2
Actually, functional programming is definitely making a come-back in the 21st century, what with the advent of multi-core processors.
In respone to your question, one word: MapReduce @ Google. Thread over.