Phanteks have good reviews and are aesthetically pleasing.
D14 are good but very ugly in my opinion.
Silver Arrow is another good one to check out.
You'll get simialr results with all of them get the cheapest or the one you like the most
Yeah I share the same opinion about the Noctua D14 as you, good but not aesthetically appealing to the eye, specially for someone that is building a system that is mainly blue.
About the Phanteks I'm a bit hesitant cuz I never heard of that brand before, so I'm a bit afraid of the durability of that cooler.