I just read your previous post regarding the Omega or the Breitling...
I have to agree with Andrew above and second that push for the Speedmaster Professional. Its the original chrono that started it all and it hasn't changed much.
My first serious watch was bought one year out of school. I didn't know any better and was bound by finances. I bought the Seamaster Auto. I still have it today some 15 years later and though I wish I bought the Professional, I love the dial and the sentimental value attached as my first "serious" watch. I guess what I am trying to say is, this watch will probably stay with you.
The Professional with its iconic dial is a winner.
Enjoy the hunt...