Depends how long you want it on for. For a couple months to a year, go with Plastidip. For 2+ years, go with vinyl. Certain vinyls look great also like the vinyl I have on my car right now looks like frozen paint. Plastidip has a very matte finish and often times make cars look very cheap. And with plastidip if not done right will have weird fuzzy texture.
My advice is just to go with vinyl. It's more expensive but looks great.
Former e92 M3 owner
Relapsed M3Post addict
Hopefully getting back into another ///M soon (or P-Car)....P-car as in Prius.