Please forgive me if you know better than this, but I want to make sure.  You are using a preamplifier right?  Lots of people who complain about not getting enough volume aren't using a preamp.  The quality of the preamp will have a huge effect on the quality of the mic.  You can make a good mic sound bad with a bad preamp, and a bad mic sound a lot better with a good preamp.
 
Anyways, I agree with the Rode NT-1A assessment above, and if you can afford it, it's bigger brother the Rode NTK is my favorite mic for any source in the guitar/vocals frequency range.

No problem, thanks for the suggestions.  I'm aware that a preamp can make microphones hotter.  I've always recorded directly to an interface and never had any trouble until I recently started recording low volume sources like classical guitar.

I have used both LDC and SDC mics. The main difference with respect to recording acoustic guitars is the bass tends to be more dramatic on an LDC and I find myself notching out a lot of it especially if playing a large body guitar.
 
Of course, a lot of that has to do with mic placement. I find LDC mics more boomier for acoustic guitar recordings. While it's perfectly ok to use an LDC you might need to put in an EQ and get rid of some bass after you record it. No sweat.. I usually play a smaller body Martin which lends itself well to LDC recording. 
 
Good pencil mics are the favored way. I don't have a good pair, so I usually resort to doing it with LDC and notching the bass.

HERE'S A NICE PENCIL IN YOUR BUDGET:
 
https://www.sweetwater.com/store/detail/CK1?gclid=EAIaIQobChMIy_7C2YXG1wIVEdlkCh1gqgUOEAQYAyABEgKcafD_BwE