Well my team is just about to ding 79 and I am about to head up to the Icebreaker/Ebon Hold quests. I liked some of those due to many being group quests and so give decent rewards and gold.
So far on my toons I have 2.5k g each on them and this really is from quests in Northrend because I did not have any gold on these toons pre Northrend.

The BoA gear really helps the grind although I am not really sure how much rested helps due to the splitting of all xp between 5 toons but I suppose every little helps.

I have only cleared 3 dungeons on the way through, UK, DTK and Gun. Once I hit 79 I may revisit HoL and see if I can do any better than the wipes I had on the first boss at 78 :P

At this point just looking forward to gearing the new team at 80 and seeing how well they do against some bosses which my first team had problems with, Ick and Krick are ones that I am wondering how much the Disc priest and totems will help on vs my druid and his mobile heals.