Best Prime?

So I want to get a good/great Optimus. Has to be old school so alt mode is a Semi. I want the trailer but would be willing to buy it separately if I had to. Rubber tires are a must. Color dose not have to be traditional. My favorite color is purple so I already have the Shattered Glass MPG-12. I like the figure. It is big though lol. Vehicle mode it where I like my figures most of the time and I am aware that isn't popular here. I only mention it bc if the vehicle mode is good or great but Bot mode not so mich I'm cool with that. I was all set to to get Nemesis Prime but I think those wheels and tires are all plastic correct? Oh well any input from you guys is greatly appreciated! Thank you