I'd love to hear more about the Chesterfield coat, once you order it. I was thinking about getting one myself, but I need to get some more basics first. If I were you, I think that whether you go 16 or 25oz depends with how cold it gets where you live. I'm sure Luxire can do a nice job with either.
I just ordered the 16oz version so I can wear the coat from September to March and not just in winter. I am going to keep you in the loop. However, I haven't submitted my full specifications yet.