I really liked the 250 350 models of the is when it came out. And planning to buy one next yr. But this yr the ISF is out and cost almost double the price of the original..Now I want the IS-F model. But is the price really worth it?? What do you think? I love the car's design, but is it worth spending that money on the IS-F or i'm better off buying the 250/350 or maybe just some other luxury car.