Best Business class amenity kits are the Rimowa kits on Eva, same identical hardware as the THAI F kits, but contents not quite as good....but close, considering its a Business Class kit.
I agree with Paolo64 that the Furla kit is the nicest I have had in THAI Business Class recently. Greyhound is cheap looking...since when does anyone want an amenity kit from an American long haul bus company?
I also had a very nice Business Class kit recently on SAS from Copenhagen to Washington, canvas and cloth in a very muted grey and tan, with a very discreet SAS logo.....classy