+1
also take into account your playing style. a couple months ago, i was able to raid maybe once a week. now, due to RL scheduling changes, i'm lucky if i can raid once a month, and most of the time now that's a gruul farm that i can't get T4 from anyway because other guildies have been farming him for much longer without any luck. i've managed to get 3 tanking pieces from kara and 4 dps pieces from kara/gruul, but that was all in the first few months of raiding. nothing has dropped for me since, and my overlord's helmet of second sight and felsteel helm/nethershrike are getting really old for dpsing and tanking.
solution: drop mining for engineering, and craft the dps and tanking goggles, GBKD, and goblin rocket launcher. the tanking goggles have more stam than the T5 helm, have a bit less dodge and have 13 +hit. the dps goggles have more strength than the T5 dps helm, a bit less hit and have a bit more crit. despite not having a single T4 or T5 piece, i'm still very raid viable for tanking or dpsing thanks to crafted gear and badge gear.