I have a Bfe and an Alpine and I have had a Chamelion and a Stiffee. I loved the Stiffee took it to the Alps and it was my all day every day bike. I would highly recommend it. The Chamelion is very similar IMO.
I currently ride a Bfe and really like it. I also loved the Alpine, it feels as though it has a slightly longer wheel base even though I was running a 150mm fork on it for everything. I run a 160mm fork on the Bfe for everything and I slightly prefer it over the Alpine because it feels a bit more lively.
All of this is totally subjective and I am sure others will feel differently. They are all lovely bikes and you will find something you enjoy about the ride from each of them.
I really fancy the Ti Alpine or the Ti Brodie because they look schweet!
Cheers
Ed