Jschwanz is right about one thing, the SPL and AMS products cannot even be compared.
I got the new SPL eliminator from IPP a few weeks ago and they are a sight to behold. I had been researching spherical bearings for a few months now, since you can buy a whole set of them for about $200 compared to the 500 for SPL, but now I see why they run so much. There are no off the shelf bearings from any of the major manufactureres that will fit properly, so SPL has custom machined housings and misalignment spacers. It's something I just never would have understood without having the SPL bearing in my hand. I'm not even worried about AMS trying to update thier design to copy at this point since the craftsmanship in these parts is something a nimrod like Vuk could never even fathom.