FWIW,
As far as general sound and micing technique is concerned, I'm with DrummerDave....I always mic the outside....one mic....but with closed head.....only I usually use a Beyer M88 (Sweet mic!) placed about 5 or 6 inches away and halfway between the center and rim.....hope that makes sense.
That said, tuning IS the most important part...I have used the Beyer, a D12 AND a D112 in the same position and while my preferences would definately put the D112 last, the sound was at least comparable and useable across all mics. I repeat...ANY of those mics should yeild a decent kick drum sound, subtle preferences aside!
I dont know if this will help you but I make sure to start tuning the kick by tuning each lug to a piano's "F" on both heads and going from there if i need to tweak it. I'd almost bet you are tuned a bit high. I have to admit....kick is one thing I never have issues with....I can struggle with THE snare sound all day, but never kick.
Good luck,
heylow