Gear whine/noise is minimal (I really don't know what all the fuss is about, and I honestly kinda like it...to a point - but it's not much, really)
I think the knob has a lot to do with the sound it generates. The OEM leather covered knob is quiet. Steeda makes an insulated one. I've got a fatknob on mine, love the classic look and awesome feel, but it's a bit noisy. But again, it's no big deal...and the Flows will cover most of it. Just realize that the OEM rubber insolators will be gone, which absorb the noise/vibration.
Enjoy!!!
When are you getting gears??? Best mod, Hands down - tons of SOTP feel and big grins!