Unless I'm missing something, the OP doesn't mention the word "now," and the sentence "I'm thinking of replacing my current XPS 13 running Debian with a FreeBSD laptop" implies that time is not necessarily of the essence. The Libre Laptop proposes an April 2015 ship date, which is about two months from now; as such, it seems like a useful piece of information, and I in fact came into this thread expressly to link to it.