To be honest, I think I'm sold on the BFe. I owned an original Soul a few years ago, only selling it as it felt too long for me despite a short stem. A return to a Cotic would be nice.
I'm also tempted by an Alpine after owning a Love/Hate for a couple of years and loving it, but the BFe "does" more for me.
The Sanderson is as yet untested and it's a significant sum of money to drop without hearing any endorsements of it. Test ride not possible either. It comes in at £350 though so only fractionally cheaper than the BFe, which I'd rather have for the extra £20.
An Alptitude is a natural contender too, as the frame I'll be replacing is a Genesis Altitude and it's a superb frame IMO. I'm certainly a fan of the Genesis brand having ridden a mates Abyss too and owning a Vapour CX.
Stiffee and Chameleon both discounted, partly for cost but partly for reports I've heard about rear end harshness. I still hope to be able to ride whatever frame I decide on all day at a push (although I have another bike more suited to that role anyway).
I've got time to think about it anyway as BFe's aren't due into the UK for another few weeks yet anyway :-(. Plus, to confuse me further, I had a great ride on my Altitude last night which is making me question why I want to change it at all…