With that setup you should be ok. I belive its not until 2,0V and over that you should start to worry. But then again many have used 2,2v without problems. even if tear would be higher we are talking a 3-4 year timeslot. consider this: will you use your cpu 3 years from now? If not then you go man!
How loud is your Vantec Tornado 80mm for CPU? Is it bothering you?
Did you have to unlock your 2400+?