New answers tagged distribution-choice
You can go with CentOS 7, which will be supported for ten years. You can install LXDE/LXQT on it. The other option is Debian 7, but for now it's not clear for how long it's going to be supported. Long support extends the period of software maintenance; it also alters the type and frequency of software updates (patches) to reduce the risk, expense, and ...
Porteus, a Slackware derivative, is best for this. I'm using Porteus right now to write this post, and I'm running entirely on RAM, i.e., no hard drives or flash drives! There's an option in the Porteus book to copy the entire OS into RAM.
The closest to BSD ports is Gentoo Linux's Portage: http://wiki.gentoo.org/wiki/Portage P.S. I have positive experience with building Debian/Ubuntu packages from source, but that's not your main question, so I'm not going to get into details.
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