My persimmon 2 wood is the straightest club i've ever hit. (if you classify it as a driver)
I don't think you'll find a huge difference in forgiviness between the older drivers but the newer ones are lighter, more aerodynamic and a lot of them are adjustable. If your going to invest in a newer driver I'd buy a new one.
This is kinda like laptops, is there much a difference between a laptop a couple of years ago to the newest version? They all can use the same programs and get the job done except the newer ones are slightly faster, have more memory and have free toys that come with them.