I keep looking at one of the discount Series 8 to replace my lasts barely half a day Series 3 but just can't pull the trigger.

If the battery replacement wasn't $80 I'd just get it on the 3 because never having to upgrade the OS on the watch is rather nice "feature”.
https://www.amazon.com/Apple-Watch-Midnight-Aluminum-Always/dp/B0BDHWBB6Z?crid=ZI57QHQXAQUY&keywords=apple%2Bwatch&qid=1687914659&sprefix=apple%2Bwatch%2Caps%2C130&sr=8-2&ufe=app_do%3Aamzn1.fos.18630bbb-fcbb-42f8-9767-857e17e03685&th=1&linkCode=ll1&tag=paul059e-20&linkId=e30ed68b433e08237cb7980dde7c6fe2&language=en_US&ref_=as_li_ss_tl