The best sound of a CG or SG would be through a microphone, natural and close to what your ears hear. However since your wanting a pickup tells me recording is only secondary to your purposes, but live probably is, then you have to curtail it to the music you want to play. There are usually two types of pickups used on acoustic gtrs, transducer and piezo. The transducer types are usually placed undersaddle and the piezo types are the ones placed in on soundholes.
It is somewhat harder to eliminate the unnatural "amplified" type of sound from transducer types especially in louder forceful playing. the piezo will sound more natural but will also be more prone to feedback.
Good manufacturers sometimes use a blend of both.
My suggestion is that you check out guitars with built-in systems, preferably blended from undersaddle transducers and soundhole piezos. Check their sound when plugged in and also unplugged.
I wouldn't bore any holes on a ramirez just to install a good pickup system whether dean markley, L.R Baggs, fishman or whatever.
Personnally for me, its always a compromise between a somewhat amplified sound or a more natural but feedback prone sound. Some of the best natural-sounding "line-in" guitars are those with very thin bodies, but then they have practically nonexistent sound unplugged.
In terms of recording, I have a really good Dominguez Javier CG for more traditional nylon work which I definitely mic. For Pop music recordings, I have a yamaha AEN which is as thin as an electric guitar and sounds very natural plugged in but has no sound unplugged. For steel strings, again its a musical choice, if its strummed rythm and you want to hear the percussive pick sound, then definitely mic it. but for fingerstyle stuff, then maybe plugged.
I would go for built in systems than those soundhole types, unless its a good lavalier mic.