I also have the X940BT, and while awesome, I like to customize everything, which the F90BT uses Windows CE, so you can actually go in and play with the directory commands (may seem overwhelming to some, but there are step by step procedures much like autofaq here). Regardless of which model you go with, I would recommend Pioneer as there is a website that is a wealth of knowledge for owners. It is by far the most comprehensive brand specific audio website I have ever used. Hope that helps.