The only thing to consider premier band with original AW purchase is if you plan on getting a Applecare+.
Apple has been very good on included original accessories as part of Applecare/Applecare+. I had replace several Mac accessories items was part of original purchasing in the past, after 1 years and before end of warranty, like power supply, DVI adaptor, Ethernet adaptor, and each time Apple genius will open a new box, give me a new one from the new box without package, then put defective one into new box to process as defective "new" item.
Not sure how apple will handle watch band damage between 1st and 2nd year for sports and watch edition, but if needed there is always possibility they could do the same as they did for me with defective Mac original accessories as part of Applecare/Applecare+ .
From footnote of AppleCare+ for Apple Watch support page:
"1. Service coverage is available only for the Apple Watch and its original included accessories that are defective in materials or workmanship…."