My opinion and summary of thread combined
Okay so here's my take. I received my SS BSB 42mm about 10 days ago, and am quite happy with. It's true while Sapphire, normal and edition models, does tend to shatter more easily, it still takes quite a bit to do it, but does offer second to one scratch protection. While the Ion-x glass, sport models, was designed to take more shocks by being more flexible, it does come at the cost of scratch protection. Just yesterday, I tripped and accidentally slammed my watch into a door frame, and my watch came out without a scratch.
Also people compare the weights of the watch as a factor to buying which really shouldn't be one, because the difference between the weight of the 2 cases is 15 grams, for 38mm, and 20 grams, for 42mm. It's ultimately the bands that differ in weight sizes and the sports band weighs the same for both sport and normal models. Your arm, if anything, will hardly feel it. I forget that I have it on sometimes, it's that light.
So it ultimately boils to how you treat your watch and what your preferences are. Here are my recommendations. If you are prone to dropping your watch a lot, especially when putting it on, then I would purchase the sport with Ion-X which is more shatter resistant. If you are more prone to banging your watch into something then go for the SS as that is more scratch resistant.
If you care about looks and are prone to dropping it, then you will will need to think whether you should take the sport, or take more proactive measures to prevent the watch from being dropped, such as securing it better and putting it on over a soft surface, or a table not too far down.
If you want to use something other than sports bands, then please dear god do NOT buy a sport, as that will just look hideous.
I hope this helps.