Matthew Comfort

I'm in need of some 140mm PWM fans with good acoustics but with hopefully a lower price point. The ones I've been looking at are the be quiet! Pure Wings 2 but their max rpm is only 1000 and I'm curious if that's a good max or if I should look for something slightly higher. I wish I could afford some nice fancy Noctua's but I'm a college student and having to kinda pinch pennies here. Any advice would be greatly appreciated