Welcome to the forums.
I have handled all of these (handled not used) but they are wonderfully made and you would be proud to own one. If you are not mad keen or unsure about the leather handle get a F1 with the Micarta, its a beauty.
IMHO The Thor (NL1) is a bit of a handful, but 2-5 are fine.
I cant tell you how well the leather handle will hold up though, but I suspect that once its been used a little and newness has worn off it will be OK.