Hey [NAME]  The SDD and HDD cages are swappable. I would go for Noctuas but ML 120 Pro Non RGB non LED single pack (not in a two-pack) should do the trick. Beware of some fans may throw a Bios error. The biggest benefit is a quieter machine when gaming, beware that AWCC speeds showing the percentage of the original OEM fan speed. Keep an eye on the fans and makes sure they don't cut out. Keep the original lower fan and be ready to replace it if you need to work the warranty. 4 years... wow 
[URL] I have a single M.2 NVMe drive. I may add this fan in the spinner bay which is empty. Would a Corsair 120 Pro be better ? The fans he's using are pretty reasonable ... 4 for like $15.00 and the splitter is like $7.00. I'm now thinking of replacing both fans in the front if it doesn't void my warranty in any way. I have No Thermal issues with my new R11 and only the top of the case gets warm which it's suppose too. I would to know first before doing this because I don't want to mess up my 4 year warranty.  Thanks !
Aurora R11, keep it cool video