My first team hit 80 today, pally healer + 4 hunters. :-)
Yes, I know hunters aren't ideal in difficult dungeons (like heroics) but I have a lvl 80 priest to replace one of them with if/when needed, and turn the pally into a tank instead. My first goal now is trying to upgrade my gear playing BG and WG for a while. After this I intend to try out all dungeons in normal mode and then move on to heroics.

A question, when I later on want to try heroic dungeons are they all equal in difficulty? Or are e.g. Utgardt keep less hard compared to e.g. Ulduar just like in normal mode? (No, I have never tried playing on heroic solo either).