Your good either way. Tanks do get faster queue times, but once you hit 71 that's no longer an issue with trusts (for the most part). But not getting MSQ XP for a DPS job is a serious pain, and leveling a DPS second is much slower. I prefer DPS first, then tank, and I tend to do that every expansion. Bards a great class, plenty of personal DPS to solo, and a fun support class in dungeons.