I recently had my Benz LP retipped by SoundSmith, and I am very pleased with the job. Since the cartridge had not been used for several months before I sent it off, I can't say for sure that it sounds identical to the stock Benz, but I am not aware of any differences.
My Benz had Peter's "retip only" which costs more since it is more difficult to attach a new tip to the existing cantilever. However, that is what he recommended and I think the results speak for themselves. As far as I can tell, I have a brand new Benz LP that is fully equal to what I started with. Considering that Musical Surroundings says Benz is no longer offering their own factory rebuild program, SoundSmith is truly providing an essential service.