Lol you and me both. I have a 170mm wrist with 55mm width and I was also sold on 38mm after watching the NY Times review until I found out it was 42mm. Now I feel like if that guy could pull off 42mm with tiny wrists, so can I. One thing to consider: Is anyone else in your family getting an Apple Watch (like a significant other)? My wife is getting a 38mm, so if I get a 42mm I'll be able to try both sizes and then exchange mine if needed. Whereas if we both ordered 38mm, I'd be left wondering (no Apple Store within 4-5hrs. drive).
My last remaining dilemma is whether to spring for the SS with Milanese and sports band on the side, or to just get the Space Gray Aluminum... Some have made the argument that surely bands will be forward compatible so they are viewing the SS as an investment in bands for the AW 2.0. If true, that's a decent argument. Reasons to go with the Sport: Money, weight, less smudgy, can still pull off the leather loop, and the space gray may make the 42mm appear smaller than the SS model.