Ok, so I am moving to Mag and starting to play Horde. I have always played alliance, so I won't have any toons to boost me. My question is, with 4 new accounts on RAF with the XP bonus, which way will be faster to 60, questing or pure instances?

I know that I will get ganked less in the instances, but will it be as fast leveling? I intend to loot to make sure that I have gold for mounts and such, so I know that the instances will take pug times and not be a 4 time an hour thing.

Any help will be greatly appreciated.