Vsync issues, hertz issues, color issues, native resolution issues... all sorts of reasons to play on a real machine with an old CRT. And why would I have a newer Windows XP/Vista computer with a CRT for DosBox? If I'm going to go through the trouble to get a computer with DosBox and a CRT running, may as well make it a real DOS machine! I use DosBox because it's convenient, but if I really want to play, I'll whip out my 486 or Pentium with my old Compaq 14" and it's off to the games.