Seeking general input re: quality of this car. Historically, I am a Lexus driver. I have held preliminary discussions regarding a 2003 Infiniti I35 that has been well-cared for and has very low mileage. The consumer reviews I have read are very mixed. The reports regarding gas mileage are very confusing. I need a vehicle and am looking for reliability first, followed by quality. Will you share your thoughts with me? Thanks.