do quests now and get the gold. gold is good and ok. make sure youll get that mount asap. level up via grinding on dungeons which will also give you a change to equip preBiS before the next raid (Gnomeragan) ;)
nah get that gold, those quests are useles anyway. Getting gold for those useless quests is worth it. When lvl 40 opens skip couple levels with dungeon grind and there you go new quests ^^