I love GOG.com; they take the time & trouble to make old games work on mondern os's. I was thinking of buying an old pc from fleabay just for this game alone, now I won't have to.
About a year ago, I bought a CH Flightstick Pro (this was the best joystick available at the time for this game). Unfortunately not all the controls (AFAIK) work correctly now, like the 4-way HAT.
I've bought this and F-117A from them; I've forgottten how hard old DOS games are. 100+ page game manuals and 3 billion keyboard commands...we've got it easy nowadays!