Dreamcast purchase considerations

[sisko]

* More or less, are the Dreamcast emulators (emulators of other systems (i.e. NES, Atari 2600, C64, etc.) on the Dreamcast) pretty good and user friendly? Is such and such emulator outstanding but such and such emulator garbage?

Why? Why place the extra wear an tear on a GD drive, when you can play the same games faster and easier through other methods (say on your PC, an emu box, etc)

* Are there any controller adapters out on the market that would allow me to play the Dreamcast's emulators with other original system controllers or usb controller?

There are tons of controller adapters for the Dreamcast. A quick google search would have told you that
https://www.google.com/