Truck Tire: Michelin LTX A/T2 -- Maybe not the best at any one thing, but really good at lots of things.
Car Tire: Michelin Pilot Sport A/S 3 -- This is a broad category, there are probably many tires that could go here, really. These are pretty good, though!
Track Tire: Nitto NT01 -- Not the fastest tire, but they're easy to drive, the last a long time, and they're relatively inexpensive. Hard to beat those qualities in a general track duty tire!
robert