Centauro 155.

I once gave the tip of the hat to the Germans for producing the most innovative armored vehicles.  They're still top notch but the Italians are definitely in the ball park.  The spaghetti eaters (I say it with love...lighten up) appear to be focusing a great deal on wheeled vehicle development and the Centauro class is worth a serious look.  Its the heaviest wheeled vehicle class in the West (possibly the world...I need to check) and they're extending the lineup beyond the Tank Destroyer to a whole family of vehicles.  The images below are of the Centauro 155 and the last pic is a lineup of the current Centauro family.

NOTE:  The guys at BAE USA claim that the Super AV is based off this vehicle and I can't dispute that...however consider the mods made to it to make it a super swimmer I can't help but consider it a distant...lets say 3rd cousin.