Love wearing my titanium FF on the NATO.. I have this exact configuration and prefer it over the sailcloth. I'm not a huge "nato" guy, but I find the Blancpain straps to be very soft/comfortable. Also works well for being in the water.
I've wanted a 5015 forever, but for some reason just never made it happen... Picked this up this week and couldn't be happier.. Blancpain is such an underrated brand and my two highest quality watches I own are Blancpain (also own Rolex, IWC, JLC etc).. Just so crisp all around - you can really tell