While I haven't bought any of your games, yet, I would buy the linux versions. I have wanting the games for a long time now, but having to get to some windows first to me always was too much of a hastle. And I love playing the classic SCRUM-MIs on my Android!
BTW: As I know you guys do download games (and therefore I guess DRM), there is a Linux-Download-Games solution by linuxgamepublishing. So If you don't want to reinvent the wheel cooperation with those guys might be an idea.