Really? It's not obvious to you why those measurements are important? Did you read the article I posted? That will educate you. If you still are still not sure, perhaps speak with a frame builder, or one of the many companies that publish stack and reach measurements right on the geometry page. Here are 2 off the top of my head. They can help you much better than me.

http://www.brooklynmachineworks.com/
http://www.cervelo.com/en_us/