A good live acoustic tone has been the holy grail for just about every performer at one point or another.
Many have washed up dead on the shores of Lake Soundslikecrap, their bodies picked over by small animals that make sounds like mocking laughter. Their wallets are empty, and their sad bones are ignored by all save closest friends and family. And even friends and family are a little wary.
I have heard cheap cracked acoustics with piezo saddle pickups that have tone to die for. I have heard (just tonight) a beautiful Martin with a blender system that should have been left in a rest area garbage can. Forty minutes of adjustments, and the best it could do was sound only mildly irritating.
Taylors, which I think sound like shit, usually sound great plugged in.
There seems to be not much rhyme or reason to it, no matter what anyone says.
My own setup is a shitty Fender acoustic. I glued a Dean Markley pickup to the top, on the inside of the guitar. It goes from there to an ART preamp, into an RNP set to "crush", to a parametric EQ, and out to a DI. Sounds pretty damn nice.
For a solo instrumentalist, IMO it's still hard to beat a good guitar, with a nice mic like you were recording, through a PA or a nice acoustic amp. (NOT Peavey, Roland, Crate, Fender, Marshall, or anything else under $1500)
As soon as you install something in the guitar, all bets are off, if you ask me. Starting with a nice instrument is always a good thing. Unless, of course, it ends up sounding like shit plugged in.
The only other thing you have control over is amplification, which like I said should be either through a PA, or a good acoustic amp.