From the videos I've watched, Romania seems to be the place for big boars. It's probably a bit cheaper than Germany, and less "fancy", but still quite nice. They will spank you when you make your first kill, just so you know!
If I were looking for a REALLY big boar, I'd investigate Russia too, but as a stalking hunt, not driven.
The driven hunts require some seriously good shooting skill on running targets, plus the ability to quickly distinguish the "legal" targets on a particular hunt. Spray and pray won't get it, and it may cost you dearly if you futz up. I'm pretty sure I couldn't do either, so would probably opt for a stalk or stand hunt.
My cousin did a swamp buggy hunt in FL, and had a blast. He used his slug gun.
