I'm not so much concerned about tire size (at least from an availability standpoint) - I just ordered a Bike Friday I just wanted to make sure I would need a size that's still in production (the bike, not the tires).

I really like the Rambouillet - Riv has other beautiful frames, but based on the descriptions I think the Rambouillet best fits my needs. I want something that's comfortable for (eventual) all day rides, yet reasonably performant. And I want to be able to take wider tires/fenders. I don't want to go with the Atlantis (though it is a lovely bike) because it's overkill for me

Thanks for all of the input!!

Carrie Anne