you guys don't know me...yet...:ninja:
But I choose the IS-F based on the fact that this is a COMPLETELY new engine and a fairly recent platform...
-Factory bad-assery is there
-Would be a nice upgrade to your past cars
-lightning fast paddle shift is something new to play with
-bump the compression a little (maybe leave it the same and fortify it) and throw 15lbs at it thru a rotrex supercharger
-has "new clientele but keep the faithful fans" written all over it
keeps stealth, clean looks, etc. super dope wheels and subtle aero, better suspension, etc...and get rid of the God-awful bumper exhaust tips...lol
Here's a comparo with my favorite car... (not on your list)
http://www.youtube.com/watch?v=gwaYyabTr7c