re: Just beat this boss/game.

Awesome game. In fact, I think it was the first SNES game I ever beat since I didn't get an SNES until a bit later in its life. As for the originals, they are hard but not unfairly hard in most cases, unlike the more recently released Megaman 9 & 10. I recommend playing Megaman 1-3 and stopping there. The other NES games aren't bad, they just aren't anything special either.

Also, this is a fun comparison of the original Megaman games vs Megaman X.