This is probably "too little info too late", but I went with Fractal Design Prisma fans. No controller, since they have daisy-chainable ARGB cables. So you can link them together and run them directly off the motherboard (using Gigabytes awful RGB Fusion software). They also work on Asus boards too, since they're standard 5v ARGB, nothing proprietary, and no need for additional RGB software. But they cost mad $$$$.