It sounds like your motor is getting ready to die. if it has not already.
2 1/2 yrs...I am going on or about that with the orig...but I dont use the vibrate function to much.
The 800w is very nice on what it gives....and I know what you are saying with the Touch Pro....I too am hoping my 67 will hold up till the end of the yr for my xmas present...lol...I guess we will just wait and see