i have been impressed with the fishman aura in my martin. It really sounds amazing. Not really a preamp solution but I have been blow away by my plugged in sound no matter what I plug it into. Most music stores do 30 day return so It could be worth a try. Might be able to get an aura installed. It would be awesome to own the mics you mentioned, but they are pricy and delicate.
MacPro 2.66 quad, Macbook Pro 13" 2.4, Protools 8 LE 003, Logic 8, McDsp, Sonnox, API 512c, GR NV500, Buzz Essence, Focusrite Solo, DBX 160A, Telefunken AK47, AKG 414eb Adam A7 Sub 8, Laney, Fender, Martin, Musicman, PRS, Marshall, Bach.