This is the biggest, roomiest and—especially—most expensive of Infiniti's SUVs. The QX80 is one of the few full-size SUVs still on the market and, if you need a vehicle this big, you won’t be disappointed. Under its large hood, there’s a 5.6-litre V8 with truly impressive power, but don’t expect it to be good on gas. Ideal for big families, the QX80 can seat seven or eight people, depending on the version.