You have a good class setup for future solo play. When you get to 80 and start gearing up in Heroics you may want to switch the class roles of the priest and shaman. It is much easier to manage a shaman healer (IMO) than a priest healer in a multibox setup.

May I suggest doing the Draenei starting area with your whole team. I hear it is has much better starter rewards than the others, much like the BE starter zones.

If you don't have the other major professions already I would suggest adding them in so you can make your own leg armor/gems/glyphs etc. I am not a fan of overloading one profession for max profit because all it takes is one nerf from blizz to ruin your economy model. At least with tailoring and LW you can DE your products for personal use or sale (depending on market forces).

good luck