[SpriteAlpha]

I have Aego M 2.1 speakers and Sennheiser HD 598 headphones.  Currently I'm using onboard sound.  I'm thinking about purchasing a Xonar Essence ST sound card.  Would this be over-kill?

 

[tom2011]

no sound cards is never overkill
 
some pepole dont like xonar cards

 

[ROBSCIX]

There is really no such hting as overkill here, the better your source is, the more options you have with your system.
You are making quite a jump from onboard to a flagship soundcard.
You should notice a significant upgrade in sound quality.