That depends on how much IAS the wearer is getting with his other equipment. So what else is he going to wear?
CV: High damage per hit, slow speed, high str req, but easiest to get.
CA: Like CV, but lower reqs
Thresher: Lower damage per hit, quick, low reqs
GPA: Inbetween with respect to damage and speed. Reqs are OK.
Giant thresher: Like GPA, but high dex req, hardest to get.