I knew that was the car for me. BUT everyone has different tastes and needs and you have to go with your logic(tastes & needs) verus your ego and pocket book.
I get a lot from my cars. They are NOT just how I get from here to there. They are more then a means of transportation. A car must bring me enjoyment or service a purpose, ie: a tow vechile for my race car or jet ski,etc.
Nothing wrong with the IS 350 for most. 306 HP, nice luxury ride or a bit of a sporty ride turned correctly, good performance for the buck, etc. Really can't say enough about the IS 350 or 250 for that matter. BUT BUT BUT if you are that kind of special person who wants and or NEEDS more, then the IS-F is it. IT willl only be a logical decission to those who know they need more and can afford it. While my IS 350 was fun, I needed more, more HP, more braking, more performance. Not that the IS 350 couldn't or wouldn't give me all it had, it would, It just didn't have enough for me and my driving taste and style.
IMHO the IS 350 and the IS-F are two completly different cars that share the same external body and some interior. The underpinings, engine, brakes, etc all make the IS-F another car all together. It is not to be confussed with the IS 350, even one dressed up to look like or that has a few performance enhancements on it. It would NEVER be an IS-F IMHO.... So this is an apple verus oranges decission, not a red apple verus a green apple decission.
If you NEED more, more HP, more brakes, more everything, even if it's only for that 20% of your drive time when you just need the performance the IS-F offers, then you NEED the IS-F. You you don't require that, then buy the IS 350 and take your girl on a nice weekend away and enjoy the ride and the scenary. I'll be the blurr wavying as I pass you by but we'll both be driving with big smiles on our faces and that's really what this is all about!

smiles per mile! And for the max smiles per mile for me the IS-F delivers BIG time!