Btw, make sure Las Vegas looks different than your other cities. I personally have been there, and can tell you it is nothing like New York. Las Vegas is very modern compared to the other cities youve made.
I must start first... Also I will finish two other cities at first. maybe three so I can upload Six USA Cities - one citiy need an airport and a finished system, one a finished stadium and one will get more than 30 houses :D