You know something, the vibration isn't that noticable today. In fact I was slowly reving it when I got to work this morning and I didn't notice it happening at all. Then I noticed it a little this evening when I got home.
I am starting to notice that this car will behave differently from time to time. Perhaps I should stop worrying until something goes 'clunk'. I notice some people worry about the temp guage but sometimes mine it dead on half way (but rarely) and more often it is between a quater and half way.
I also notice that my fan only comes on every 30 secs or so for about 5 secs, then goes off.
Don't know what others think but the car runs great and fuel economy is good and as I don't have about 2K to give to my local garage to fix, I'll not worry too much.