I know people love their Colliers (and other Edisons), and I have never tried one. I might love them too.
But let me also say, from my point of view, that list price $169 is a lot of money to pay for a steel nibbed, unpostable pen intended as an EDC.
Edison pens are beautiful, and folks rave...except for those who wouldn't spend that kind of money on a pen with limited versatility. It's size means that it is probably not a great pocket pen, either. If you're male, and you ever keep pens in a shirt pocket (is that sexist to assume?), then I would recommend something with a smaller profile and that is postable. I know you stated that you keep pens in a satchel, but still.... Maybe I am biased by the fact that I have to carry my EDC pens in my shirt pocket at work or I just won't use them.