The fists are to S2 as S2 is to S1, pretty much. They're ridiculous.
As for the plate, I haven't checked to see how strong it is really... glancing through it, Haste isn't our best stat (~70% as good as Crit is for DW, haven't run it through as Arms yet) but there's just so many stats on these quite a few of them may be major upgrades. I'd almost certainly get the weapons first, though.