is it worth going for the "higher end" fans compared to cheaper case fans with good reviews?
most "cheap" case fans, like those included with lower quality cases, are
very low quality that do not move much air, make more noise than average, and lack PWM control.
so especially in this situation, yes higher quality fans are definitely worth it if you are concerned about having good system-wide temps and less noise. but that does not necessarily mean they need to be expensive fans.
most of the better quality case manufacturers also produce decent to high end fans and those are usually included with their cases.
so in this situation it would usually not be worth it to spend a lot more on what may be considered high end fans.
if you're looking into water cooling and fans for your radiator(s) than higher end fans with very high air pressure and quieter operation are also a better option.