I have never owned an F4 but did hold one in a camera shop once and loved the feel of it being a like a sculpted piece of metal and really like the idea of matrix metering with manual focus lenses, but it was missing something... a winder. One of the reasons I love the F3HP is the ball bearing smooth feel of the winder, made my FE2 feel like it had gravel in the drivetrain. I haven't used the F3 much since getting an F100, but I still want to keep it because it is just so much fun to use.