I wouldn't worry too much about wanting an I35. First off, I think they are going to be discontinued in another year or so (rumor has it). Second, don't we all ALWAYS want a nice, faster car with MORE horsepower!
Your car is great, pretty quick, and has all the creature comforts! Also, I LIKE IT, so what more could you ask for! HA!
Baby it, use synthetics, keep the tires in good shape, and that baby will last you a LONG time!
Jeff