Neither of those will be either, if Ford continues putting out better products. The only noteable exception will be the last generation of large displacement, spark ignition cars. Otherwise, like the 2010-2014 GT500, the Boss, etc...all of those cars people had the SAME idea, but then Ford continues fielding better products and those cars like all others, become terrible INVESTMENTS (compared to what you could make alternatively).I don't think a run of the mill S550 like mine is a collector car. When more is known about the S650 I might explore a Mach 1 in one of the new colors or wait and get an S650. I would probably treat either if those more like a collector car.