What is something you really should spend a little extra money on to make sure you're getting the best?

Rain jackets. I'm from Washington. It rains constantly. So I love camping, right? So way back in the day, like 12 years old, my parents weren't sure if I was going to get into it full time or not, so they got me one of those rubber type jackets. They're super effective. Until they rip (which I feel like is fairly easily). Also, they don't breathe for shit. After that, I got one that was ish about 30 bucks. Poly-whatever. And while it would hold off rain, it wouldn't hold off Washington rain. You know, like you peel it off at the end of the day and the inner layer is moist, kind of thing. After that one, I finally bit the bullet and got like a 200 something dollar one (on sale - I think I paid between 100 and 120). Oh my god, it's so much better. I've had it for going on 15 years, and it's still dry as hell inside and breathable.