I prefer the mic in the room and in front of the guitar about 12" or so. The pickups on acoustics are generally not very realistic so a good condenser mic, properly placed wins the day. You need to experiment with placement to see what works best. 12" to 18" over the 12th fret is a good starting point for a single mic. Dual mics...also mic the body near the sound hole but not in too close.
As far as EQ and compression, only use what you need. Nothing more, and nothing "just because"....
FX.... nope. I will record it twice and pan it for a doubled thicker sound.
That's "in a nut shell" on how I record acoustic.