Very timely, I absolutely know what you mean.   I've been struggling with my acoustic guitar sound on a project today - the Taylor pickup is too harsh, the mic is boomy (and the birds are very noisy today), and the iRig Acoustic Stage sounds like a tiny echo chamber.  But, as said above, I have mixed all 3 and SONAR came to the rescue.  LP-EQ and LP-MB have really cleared up the mud and quack.  However, they don't do much for the analog birds chirping outside my window so I'll have to do another take on the chorus.

There is Bodilizer vst for piezo suppression.
 
Also try this in a relatively dry room. Point a small cardioid condenser away from the guitar hole and pointed down at the horn of the guitar if cutaway and the same place if not before you give up. I saw it done here and it worked better that any way I had tried previous. https://www.youtube.com/watch?v=9YinM0hJlfw
 
 

Haven't loved the direct out of the Taylor CE's either, but generally record it just because. Can sometimes be useful when blended with a mic in dense mixes.
 
In addition to the previous suggestions;
 
- Try pointing a condenser mic at the body below and away from the soundhole. Less boomy, helps with pick scrapes, possible to get a pretty decent sound. 
 
- Try CA's FX Chain preset for the output of your Taylor.   CA-X Amps Producer > Acoustic Piezo
 

Down in the Songs forum Bacco has a CE "direct" to the board: Mona Lisa
I was very impressed!
T

I found this YouTube series from Neumann very helpful:
https://www.youtube.com/watch?v=aivxxQLK9Qw
 
Like a lot of the others here, I blend the mic with the guitar's onboard pickup when I'm recording.

Following this information in this article has greatly improved my piezo acoustic pickup's sound:
 
http://www.harmonycentral.com/articles/better-sound-from-acoustic-guitar-piezo-pickups
 
Just use your ears to fine tune your EQ to the sound you want.
 
good luck

Really helpful info here. Loved the Mona Lisa recording, but my Taylor doesn't have the newer ES2 system. The Harmony Central article was really enlightening, and I seem to think that Anderton's 30 ProChannel EQs from a couple of months back contained that same piezo EQ curve. I haven't installed them yet, but I'll check that issue of Music & Tech to confirm. I'm currently doing a poor man's acoustical treatment of the room using blankets and rugs. I think a combo of micing the guitar in a less reflective space coupled with a direct feed with a proper EQ setting will be just what I need. Now I just need to get rid of the three toddlers for a few hours... 😉

I made the Acoustic Piezo CA-X amp (February 2015 update) specifically for recording acoustic guitars with piezo pickups, but it's useful with other pickup systems as well. This screen shot shows the updated version, which will be available soon.
 

 
The same update also included ProChannel presets for acoustic guitars. Although tailored for older Gibson guitars, they provide a point of departure for other guitars as well.
 
 

mrpippy2
I have a Taylor 314-CE and I'm not super happy with the sound I'm getting from micing it.  The room isn't acoustically treated, has some reflective surfaces, and I'm getting a "boomy" and somewhat more ambient sound than I'd prefer.  While throwing up some blankets and down some rugs is an option, I was thinking of just recording direct and playing with the sound inside of Sonar.  The Taylor has an electronic pickup system called Prefix Plus, FWIW, and I thought I'd just plug directly into my Focusrite 2i2 interface and see what happens.  Does anyone have any suggestions?  Not sure if I would need a direct box, or if the Focusrite is ok to plug directly into.  Or I have access to a Yamaha AG Stomp (I guess kind of like a Line 6 Pod but for acoustic guitar) if that would be better.  Any thoughts would be welcome!

Use a decent small diaphragm condenser and adjust mic placement.  If it is boomy you are likley placing it either too close or too direct at the sound hole.  
 
I say SD condenser as it will be more directional than an LDC - and since your room isn't any good that will help.  It also tends to have a more focused sound, which with your "too much ambient sound" that would help.  Preferablly a super card pattern if you have it.
 
If you truly need to go direct, I would invest in a used Fishman Aura - they have profiles specifically for the Taylor 314 with the Prefix system.  I have an 814ce and it is the closest thing I've found to getting a "mic'd sound" out of a direct setup.  The old one like this might be cheaper on the used market than the newer one, not sure:
 
http://www.woodpecker.com/blogs/blog_pics/aura4.jpg
 
I've used it for years for both live and recorded applications.

Have a look at DPA 4099G - G stand for guitarversion clamps:
https://www.youtube.com/results?search_query=dpa+4099g
 
Just great for any guitar and easy to apply, just clamp into body - and remove just as easy.
 
I saw a performance on tv some years ago - and local music store helped me find out what they used.
 
I complement KKsound mini under bridge internal mikes on a Martin D16GT but also on a nylon.