Welcome to the site man, glad to hear you're considering the F! The thread below is a very helpful if you're considering purchasing an F or M3, hopefully you'll enjoy them. Let us know if you have any other questions or we can help in any other way! 
http://www.clublexus.com/forums/is-f/485902-convince-me-to-get-an-isf-over-the-e92-m3.html
http://www.clublexus.com/forums/is-f/485902-convince-me-to-get-an-isf-over-the-e92-m3.html