I agree with Bram, the 250 GTO wheel is simply awesome, but I could never justify such an expenditure on a TM product, so I don't own it and therefore it's not my "one."
My vote is for my 599 EVOXX 30, which sadly I have never even used! (LONG STORY.) The replica captures what a round wheel should be in the modern sportscar era with good looks and restrained buttons.