So why did I switch and for what class?
I have been gathering information through forum/ ign / other website polls and the Barb always comes out to be the leading class with an average lead of 7-10% over all other classes (standard deviation is very low)
You are thinking; big deal so what, yes it will be the most played class, more items on the RMAH for me.
This is where you are very wrong, with such disproportional numbers while there will indeed be more supply of barb gear, there will also be more demand, and let's face it this is simple economics, Barb weapons will be one of the highest selling on the RMAH.
For people like me who will only have a couple hours on the weekend to play this game the RMAH is a great solution, but what drove me away from this class is precisely this matter, I will be spending a good amount of money on the RMAH and I don't want to pay markup on barb gear.
The next issue comes again from such large numbers of barbs, more then likely a random game at any given moment will have at least 2/4 barbs, maybe more. If you watched Jay's latest interview on Inferno, working in groups as a team will be easier due to the variety of management abilities. Meaning if you are just another Barb in inferno your group will most likely ditch you over any other barb with better gear (unless you have no life and or spend absurd amounts of cash on virtual items).
There are many other issues at hand, but IMO according to all the preliminary statistics the best class to roll as of right now is in this order Witch doctor > Wizard > Demonhunter, these 3 classes are most underrepresented and will have the greatest chance of getting gear at reasonable prices and stay in high demand in inferno group runs.