I would agree here, my machine does sound like a Harrier, but I don't mind, since the machine runs good and what not, and I usually can't hear it since I am always playing music and games while at my PC.
I do not leave my machine on all the time. There are some schools of thought that you should leave your PC on all the time, but I disagree. Would you leave your VX running all the time? To me its like putting extra miles on your computer that you don't need to.
Bart