Time to switch to fire? need help

hi yall, iv always loved fire, but i do know it only becomes competitive once you reach a certain crit. With the past few upgrades iv gotten, iv worked out i will have 30.19% crit once i do all the reforging and regemming and stuff. Is this a decent amount enough to switch? or too early and should i stick with frost for the time being?

heres a link to my charc: http://us.battle.net/wow/en/characte...astar/advanced

Your opinions will be very helpful! thanks!