Man, I could swear I posted a comment on this thread, and someone even referenced my comment. But both disappeared?
Anyways, I like to pick my point weight, 190-200gr. personally. Then get a test pack of shafts and find out which shaft tunes best to my points.
I'm currently shooting 225gr. heads with tapered spruce, but I think I'll go back to 200gr. on cedar shafts for my next batch.
I don't know what the negative aspects are, as I've only ever shot wood arrows, but it seems to me that wood breaks less often then aluminum bends when you miss a target. And, as tough as carbons are, a lost arrow is a lost arrow... The only desire I have to ever go to carbons would be to make some super high FOC arrows.