If I had to choose between the two, I would support evidence based malpractice. If you have signs of lupus then the doctor shouldn't do tests for hepatitis just because that is what everybody else is doing (yes, I realize that the two have next to nothing in common and logically a doctor would never test for such but, it's a hypothetical goddamn it).
An alternative is the "sorry works" system which is when a doctor reports medical errors to the administrators who then begin the process of negotiations. This system is already in place in the University of Michigan health system and has already reduced lawsuits, cut litigation costs and sped the resolution of cases.
Another alternative is the "health courts" which is the system the Scandinavian countries and New Zealand have in place. Basically, it's a no-fault system much like workers compensation.
Here is a link to a article written by Barack Obama and Hilary Clinton (in 2006) discussing malpractice reform.
Link