Aloha,
Great S/D mics mentioned here already.
Up to $1K? There are so many: modded AKG 460/480's, Neumann 140's (Ok, so it's a stretch), Peluso CEMC6's, Shure 81's, Beyer 930's, modded Oktava MC012's, AT 4021's, Mojave MA 100 or 200's (another stretch) - all accurate and warm. Stay away from Rode, MXL, Audix, Josephson, Sennheiser S/D's if 'warmer' is what you're after. Based on my experience of them all.
An important part of the equation is matching the right mic to the right preamp, right guitar and right music. That's where the art of recording guitar comes into play.
TIP: ADK A6 (under $200 street)- Hook a pair of these up to almost any preamp with great results - warm and accurate, w/o distortion and too much self-noise. To hear it, go to Dream Guitars. Almost all of Al Petteway's samples use a pair of A6's W/O EQ.
http://www.dreamguitars.com/preowned...on_0402114.mp3 Or this:
http://www.dreamguitars.com/new/tipp...ndo_708020.php
Expensive Tip: Schoeps CMC641 Hypercardioid ($2-3K street) - Out of your price range, but this is my favorite mic for recording acoustic guitars. Most accurate and warm. I had to save for a long time and becoming single again to get a used pair of these. It's worth it to me!
Go the Doug Young's site and listen to the reference mic samples from #50-87. #73 uses this ref. mic and shows how rich the overtones of a great guitar can sound on a great mic.
http://www.dougyoungguitar.com/pickuptests/
Check out Doug playing here using a pair of CMC641's and a bit of Magmic:
http://www.youtube.com/watch?v=m0Bbgucd7K4
But if it comes down to choosing a less expensive mic -
that your ears like - then do so AND PUT THE REST OF YOUR BUDGET INTO ROOM TREATMENT! That's the real way to achieve warmer results and control.
alohachris
PS: You can also buy used from reputable sellers to cut costs. I've had great success doing this. I also rent to own from suppliers all over the place, pay for r/t shipping and try 'em out on my rig - the best way to let your ears make the decision, IMO. - alohachris-