Its hard to answer unless you define what the "pure way" is. Are we talking SOA pure or WCF pure?
As jfar said it depends on whether you are going to the be only one consuming the service, or whether the presentation tier is going to be you only.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.