I am confused on what this post is about? First you are complaining about inlines prices, than you are asking whether or not you should upgrade your valvetrain, than you are asking about a turbo kit?
What do yah need to know brotha?
Valvetrain-- upgrade if you want, stock is fine
Inlines prices-- seem reasonable for all the work that they did and the parts you baught, keep in mind you are also paying for their knowledge
turbo kit- depends on your ultimate goals
By the way-- punctuation and gramme are your friends, use them.