Quick cheap dirty nice solution: velcro stickers

I have 2x Nexus 92mm fans at 12V and I had to remove the filter because the intake noise was too much. The case is only a foot or so away from my head, but I'd say it'd be best at 5V or 7V. These fans push excessive air (IMO) for simple HDD cooling, so I'm sure it wouldn't hurt at all to undervolt t...

Basically it means that if you look at it from above or below, you should not be able to see the fan blades.

I've been reading various sources about ThermalRight's heatsinks, and some said that SI-120 is better than SI-128 A) with lower CFM fans, and B) at cooling surrounding things.
So I'm wondering if anyone that's used SI-128 and/or SI-120 can give me a heads up.