Jeff,
Do yourself a favor, and consider the curved switches. They may not be Atlas, but Peco switches are very reliable, + give you operational/trackplan flexibility you can't get just about going any other way, besides trying double slips, or stub switches, and you really don't want to go there.
The Peco machines seem different than Atlas, but really aren't that much different, electrically.
Regards,
Carl/Otis