What do you think of these cars?

I would narrow it down to either the Infiniti or the Audi. The rest are either Gas guzzlers or just not up to par with the Audi or Infiniti in terms of performance and handling as well as luxury and refinement. The over all driving dynamics of both these cars are great and are one of the best in its class. If you like the G37 & the A4 you should also check out the 2010 BMW 3 series. If your looking for a lot of horsepower then the class leader in your list is the Infiniti G37 rated at 330 HP and FX50 at 390 HP. By the way there is no 2010 FX45, its either a 2010 FX35 or FX50. The Audi A5 and A4 are pretty underpowered standard at only 211 HP unless you choose to opt for the more powerful Audi S4 or S5 however in terms of styling the Audi is undeniably a great looking car. The Range Rover is a nice SUV too but its a major gas guzzler and the 2008 RR HSE isn't too fast either, its great for off roading but in terms of styling it looks a little out dated next to the new 2011 RR HSE.