Great thread guys. Was looking to replace two of my cheap 120mm case fans and am eying the Zalman ZM-F3 fans, mostly because of the low price, good reviews, and the fact it comes with anti-vibration mounting pins. However I did read that it uses sleeve bearings. Does this mean it has a relatively low lifespan? Like eventually it will start whirring and grinding like my previous cheap case fans that I have to replace everyone 2 years?