2.5 HDD in SSD trays

Hi there,

I wish to get rid of the HDD cage in my 450D to give the better Airflow possible.

So I intend to put a 2.5' HDD in the SSD bay on the backplate.

So this is my questions to anyone who did this :

Is there any vibrations coming from the HDD ?

Is there some models that vibrates less than other ?

Should I choose from a specific speed 5400 / 7200 to have less noise ?

Thanks for your answers !