According to Fox News, the new hotness in zombie survival automotives is the Knight XV from Conquest Vehicles. Like any proper knight, this car has a full suit of armor (and uses Roman numerals). Unlike any proper knight, it comes with a wet bar, flat screen TV, humidor, roof-mounted spotlight, and external surveillance equipment. It even runs on bio-fuel, so you can make your own fuel (if you figure out how) when supplies run out. Only 100 are being made, so this is sure to go quickly. Though not too quickly, since it cost $300,000.
In the words of Gollum, "I wants it. Preciousssss!"