Nothing wrong with choosing a 1" steerer. But it will narrow your choice of upgrades/replacements (forks, stems), since the industry seems to have adopted the 1 1/8" 'standard'. This applies to the 'road' catalogues, don't know about the cross world.

Recently, I friend of mine bought an excellent Morati road frame. The seat tube measures 27mm. Finding a seatpost to match was quite difficult. That would have been a lot easier with a 27.2mm tube.

Good luck with the Habanero! Let us know how it proceeds.