Again on crit/haste, using my stats in Wrathcalcs (251-264 gear, no hard modes):
<realised i hadn't backed up my prefference of haste over crit with real numbers>
DPS increase for choosing 100 haste over 100 crit:
crit cap, 400 haste: +40 DPS
crit cap, 700 haste: +13 DPS
crit cap, 1000 haste: +11 DPS
For me anyway, only at 1500 haste is it worth to get crit instead of haste.
But as i said above and as you can see here, these differences are so minimal that by choosing 5T10 and the crit+haste gear available, you won't care what you gem, crit or haste.