"Stuff" like what? Better and cleaner bass range. Smooth mid range and crystal clear clarity and extension? -Pretty hard to miss good sound quality. Opamps are not just about simple voltage gain and volume. They are the last amplifications stage in your card and are responsible for alot of the sound quality and sound signature the card has. "bad" or cheaper grade opamps boost your signal but color it negativley, they can affect the response make your bass tubby, your mids crackly add noise, remove ambience..and in so many more ways I won't even attempt to explain. If you are happy with your card, great enjoy but don't for one second think your at the end of the line and there is nothing better out there because your mistaken. Speakers are always a good upgrade but again they can only amplify what you have at the source which is your soundcard and media.