For the record, I'm the person that got PCI to make those spherical bearings for a TSX.
I even sent Brian my old control arms. I think the selling point was that the same parts
could be used for three different chassis. Anyway, they work well, but after having them
in for a week, I decided that the crisp steering response wasn't worth the extra road noise.
Just my preference.
Also, the 04-06 TL bushings are harder than the 07-08. Acura went softer for the 07-08 TL.
I have a press release stating that all the suspension bushings were softened up, with the
exception of the Type-S shock bushings in the top hats. Those are harder and also have
the washer molded into the part.