Build help - small FreeNAS

[the_b_man]

Would anyone be willing to make recommendations for a parts list on a small FreeNAS build?

I'm out of the loop on PC building, having lost track of chipsets and socket numbers years ago.

Re-using:
- Nothing

Requirements:
- As low cost as possible (main goal)
- ECC preferred if possible (do AMD consumer parts still have this option?)
- Able to transcode at least one 1080p stream using the Plex server plugin
- Six drives (6+ SATA, 6+ case bays)
- ZFS/RAIDZ2 would be the configuration

Also, drive recommendations? I once read something about WD Red drives and their MTBF (or other metric) making them inadequate for NASes. What do the experts do for drives, without breaking the bank, when doing NAS builds?

I know these are probably common questions, but there isn't a sticky tackling these. It'd be great for the experts to put together such a thing for novices like myself, updated occasionally like the router recommendations thread, etc. A list of popular drives for use in NASes, and a recommended cheap build, recommended beast rackmount build, etc.

Happy new year