Which car should I consider over the other infiniti g35 or audi a4?

Right now the gas prices go up and by the information provided in catalogs a4 gives more mpg than g35 (by 2-4mpg more). But then again g35 (my first on the buy list) looks amazing and feels amazing, a4 is not bad either. Both cars are good in my opinion. Which would be less of a hle to repair if something wrong and which one is more durable? I'm aming for 2005 infiniti g35 or 2005+ audi a4 (love the enourmous grill). Please suggest if you have had or know something about both or any car at this point.