No one has mentioned it yet but how do you think 2 piece Slayer's stacks up against some of these upgrades? 5% haste on slice and dice seems pretty huge even compared to the raw stat upgrades wotlk items offer...
Just going by shadowpanther for the sake of argument.
slayer's wrist - 112 maep
sinner's bindings - 167 maep
+55
slayer's boot - 162 maep
footwraps vile deceit - 230 maep
+68
slayers belt - 158 maep
stalk skin - 223 maep
+65
Passing on the smallest upgrades in favor of Slayer's 2pc you lose 120 MAEP from raw stats but gain the 5% haste on snd. I'm not too great at haste calculations, someone check my math here :X Going to use my gear which currently has 230 haste rating, or almost exactly 7% haste. I got Torment of the Banished (2.6 spd)
Using
Hasted Speed = Weapon Speed / ( (1+(Haste1 %)) * (1+(Haste2 %)) * (1+(((Haste Rating 1 + Haste Rating 2 + ... )/100)/32.8)) )
2pc hasted speed = 2.6 / (1.35 * 1.07)
So if I wanted to achieve the same weapon speed without 2 pc slayers I would have to add X haste rating to my gear:
non-2pc hasted speed = 2.6 / {1.30 * [1+ (((230 + X) / 100) / 32.8)]}
2.6 / {1.30 * [1+ (((230 + X) / 100) / 32.8)]} = 2.6 / (1.35 * 1.07)
X = 129 Haste rating (i think

)
Shadowpanther values 1 Haste rating at .90 MAEP so
129 Haste rating = 116 MAEP
So 120 maep vs 116 maep, those are pretty close values. Unless I'm retarded
So I guess the point is to keep the 2pc slayer's until you can replace all 3 of the Sunwell Slayer's pieces with some of the high end wotlk epics that Chalon or shadowpanther list.