In this final installment to our feral cat gearing series, let's take a look at augmentation. No, not that kind of augmentation, silly -- the ones that make your character better at laying down the smack, DPS-wise.
A word to the thrifty: A character with no enchants versus a character with full enchants loses about 10% DPS potential. If you don't use consumables, that knocks off another 10%. A 10-20% shortfall is certainly significant but not critical. I wouldn't worry about enchanting gear for tackling solo content or normal-mode dungeons. Once you get into heroic dungeons and raids, though, you're doing your fellow group or raidmates a disservice by not putting forth the best effort possible, and that effort includes fully maximizing your potential.