Originally Posted by DangerDad
why wouldn't I transfer through the spigot instead of a siphon?
There are two sanitation-related reasons you may not want to do this. First, if you did not disassemble the spigot and completely sanitize the interior, it may be harboring some nasties. This is probably a very small risk if this is a new, unused spigot. If you previously used it for bottling or ran beer through it, I would be worried about this one.
The other is that if you didn't cover the spigot or keep it in a clean location, something (dirt, bug) may have found its way into the spigot. You can probably mitigate this by washing it and sanitizing from the outside, but it's a bit harder than removing/sanitizing the thing.
Otherwise, I think it'd be your better option. It should provide less opportunity for aeration (bad!) than a siphon, and is certainly easier. Whether you want to bottle directly out of primary or go to a secondary for brightening is up to you. I'd go through the brightening just to be sure there wasn't 6 inches of trub waiting to be kicked up when you move the bucket. (I am extremely sediment-averse with my beers.)