defiantly record the guitar via a mic never plug in an acoustic for recording
+1
infact, i usually used a dual mic set up set up
but that requires a LOT of know how. using the 3-1 rule... the distance between two mics should be at least three times the distance between each mic and the sound source.
that way, phase cancellations are kept to a minimum, which gives off a smoother sound.
i.e
if you've got each mic seven inches from the guitar, the 3-to-1 rule mandates that you spread the two mics at least 21 inches apart from each other
recording is a lot more than having the right equipment.
for quality recordings you need to have 4-8 mics for recording drums
and if you are going to record electric guitar - sure, a SM57 is fine for live.
but you definitely should dual/stereo mic. that way you can blend the two signals getting exactly what you want and will be able to create a thicker tone in the recording.
vocals, a condenser should be fine - but a ribbon would be nice to have to add that certain sound only a ribbon mic can produce. also, this can be nice to include in your acoustic recordings.
i would recommend recording bass DI - it would save you A LOT of trouble. same thing for keys - unless you have something like a twin reverb where you get most of your TONE - then you should mic it.
recording is an art! haha
😛