I'd not advocate aluminium for anything other than an aio. Even the EK stuff is rather limited in application. Can't put anything nickle or copper with it, so changing out a block or stepping upto a gpu block is nigh impossible. Cheap yes, but you've just created a user fixable aio in all reality.
For a fan, you'll not do much better than the Noctua A8. It's extremely quiet, @ 18db(A) at max speeds, capable of almost 50cfm. That's equitable to many 120mm fans. It also is a higher static pressure fan. Just don't let the numbers tell the whole story, static pressure isn't standardized as such.
Better off in pull with those rads, rather than push, unless planning on running fans @ 2000rpm. Push, you get dead space under the motor housing, no airflow through the fin area, the 'dust donut' affect. With 80mm fans, that's important as the actual blade area of the fan as compared to the motor size, is rather small. That forces the need for more air in an even smaller area.
Pull creates a vacuum in front of the blades. That vacuum is filled by air pushing through the entirety of the rad face. No loss of area from the motor housing. So while you don't get the same 'breeze' from the fan face as you do from the fan exhaust, the overall affect is higher efficiency of the rad. On an 80mm rad, it's closer to double.
I'm using 2x Noctua A12x15 (15mm slim fans) on a 22fpi rad at @ 450-500rpm and 2x Noctua A12x25 on a 20fpi rad @ 450-500rpm. Both in pull. Raising the rpm of both sets to 1000rpm drops coolant temp 2°C, so there's no real need for more.
For many years, the 2 best rad fans available were the Noctua NF-F12 and the Scythe Gentle Typhoon. Strange thing about both those fans was the stats, both were very mediocre for cfm and static pressure, there were plenty of designs with higher. But it was the balance or ratio of sp to cfm that made them so effective. Only the Deltas got better, at the cost of noise. If you've ever been in a Server room, bring earplugs. 60+ decibels is far from quiet.
The issue with many of the better Delta designs is power draw, most motherboards cannot supply the 3A (ish) some fans require, so by necessity, they'll be uncontrolled, direct psu hookups.