2010 you would get the eagle 5.7 which has more power than the 06-08 5.7s, and still keep the body style, or any of the new ones, youd get the new body style thus more being still available for it.
you should be able to find up to an 12 for about 20k, without a trade in if u do some good searching and bargaining
you should be able to find up to an 12 for about 20k, without a trade in if u do some good searching and bargaining