dilemma over gearFollow

I've got the boots of blasting and have the pattern for belt of blasting (just need vortexes to drop >.<) and my hit rating will now be capped with the belt, really what I'm wondering is if I should start stacking haste.

I'm thinking of replacing spellstrike pants with the BoJ haste pants and maybe getting the BoJ bracers (Int/stam on the pants will be a bonus as well) and then getting the new haste trinket when 2.4 is out.

Is this wise 'cos i've heard that haste is better for us than dmg/crit, but then I read today that it wasn't..

Does anyone have the numbers? i.e 1 haste= 0.8 spell dmg or whatever

(Shorlin, thunderhorn eu, undead mage)