Unfortunately there is no "hard" data. No one really knows which type
of rebuild is most reliable or who is the most reliable rebuilder.

From a fundamental principles line of thought, the more parts you
replace the better off you will be. As for warranty, we would all
prefer not to need it.

My take is this, the more you pay the better you get. If you have the
money, get Lycoming new, if not, work your way down from there.

The best cost/benefit seems to be a local rebuild shop (one that
specializes in rebuilds) using your own core. You wont get a zero time
engine, and the warranty will probably not be that great, but your odds
of the engine making it to TBO are pretty good and you have some local
personal contact to work out problems, if they should occur.