Mic choice for a National Tri-Cone Resonator Guitar

Just purchased a beautiful M1 Tricone national, want to record it, Just don't want to spend too much time re-recording it with too many mic choices and such. I wont be using a slide, more finger style and some heavy chord strums, backed up with a rhythm guitar and a mandolin (also needing advice on recording the mando as well)  was just seeking advice to try and keep experiment time to a minimum, I have some large diaphram Condenser mics, as well as two shure SM81s and a few SM 57s, the setup I will be using only will allow two mics at a time. So any advice sure would be appreciated thanks.
Peace
M/C

The AKG 451 is a good suggestion. It does very well on acoustic instruments.  Definately worth a try.
I might suggest that you plan on taking some time to find the right micing method to help capture the sound you invision for your particular instrument. If you have decent mics, you may find that your mic placement is probably going to be more important than the mic you choose.
If you are self-engineering it can be time consuming finding the right mic position while playing the instrument. It is tough to evaluate the mic position through headphones when the acoustic sound of the instrument in the room is bleeding into the headset.  I'm involved in a project right now that requires me to play a variety of acoustic instruments (among them National, Dobro, and mandolin). I use a set of Sennheiser noise canceling headphones to evaluate the mic position. It removes most of the room sound from the headset, leaving the sound coming through the mic. This method helps me make good decisions regarding mic position without the spending the time to record numerous short sound tests.
I'm using one of two mics depending on the character I'm looking for:
1) Neumann TLM193 - This is a mic with a very flat frequency response (no upper-mid hype). The off axis response is very consistent. You can use it close-in or across the room and you will get a good accurate representation of the performance. This does well in capturing the mid-range body of the sound of the National while minimizing the stringiness.
2) Audio Technica 4060 - a smooth tube mic with a bit of extra sparkle on the high-end. This mic works well if you are looking for a slightly dressier sound for the National. Still warm and full, but with a little extra zing.

I have a 1928 version of one of those in my Variax!