SmartUPS... apcupsd? nuts?

[Lewis Watson]

I am using (APC) SmartUPS l000XL's, several FreeBSD servers, a couple of
Windows servers,  and other misc. gear. The windows stuff will be upgraded
to FreeBSD eventually and so it only makes sense to bring an APC daemon
online with FreeBSD. There seems to be several for the smart-ups model...
apcupsd, upsd, upsmon, and nut. Anyone have any favorites or preferences
between these in a production environment?
Thanks a bunch!
Lewis