Thanks for all the quick replies! I am aware of the rediculus strength of the magnets inside the hdd, but wasn't sure if that was a "controlled" magnetic field that could be disturbed or not. All possible cables are neatly tucked behind the motherboard tray so the only cables that would be even remotely close to this new CPU fan would be the power and SATA cables from my SSD. Sounds like I'm in the clear, this was good peace of mind. Thank you everyone.
If anyone cares, I'm very impressed with this fan. I hooked it up to my "open air" case to test it out and it pushes lots of air while also being very quiet. Unfortunately I don't have a smoke machine (or a nice rack) to create any cool videos about fan airflow patterns
but that's what youtube is for. The only noise I hear is the woosh of air. The "halo frame" seems more of an aesthetic/marketing gimic than anything, but it definetly makes the fan look unique and cuts some weight without sacrificing rigidity (for what it's worth). The fan blade does pop off with a gentle tug for cleaning, though I've never not been able to clean a fan sufficiently with just compressed air. Great fan with a relatively low price of $12 shipped.
i5-3570K, ASRock Z77 Pro4-m, Asus GTX660 TOP, 120 GB Vertex 3 Max IOPS, 2 TB Samsung EcoGreen F4, 8GB G-Skill @1.25V, Silverstone PS07B