Ok, I want to get into the thing of Emulators for my PC.....and so I have no idea where to start.... little-Mac posted this link http://zophar.net and I downloaded this Kawaks emulator...and it installed.....now I only need the Rom for X-Men Children of the Atom.....so

Please post any links that would help me and fellow users for
Finding good quality emulators and roms
and problems you've encountered using these

Also comment on what you think about emulators