Looking for a nice upgrade to my on-board audio

[Consciencekills]

I currently have a ASUS Crosshair V Mobo with a X-fi sound card onboard, although ive heard its not really an x-fi as it comes with just general realtek audio.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131735
I have Klipsch 2.1 promedia speakers and i'm looking into getting a nice set of headphones around 200$-300$ soon.
Any ideas on what soundcard would give me the greatest increase in sound quality from what i already have?
I use my computer for videos, music, and gaming.
I've been looking at the HTC Claro II and HTC Omega Striker
Any opinions and suggested would be greatly appreciated.

 

[gamerk316]

The first question: Are you going to get high impedance headphones? If so, then a soundcard with a headphone amp is a must.

The best deal might be the ASUS Xonar Xense + PC350 combo. While there are better headphones then the PC350 (which are still very good, but not great), the Xense is a top tier soundcard by itself, so this might be the cheapest option for both a soundcard headset.

 

[Consciencekills]

The first question: Are you going to get high impedance headphones? If so, then a soundcard with a headphone amp is a must.

The best deal might be the ASUS Xonar Xense + PC350 combo. While there are better headphones then the PC350 (which are still very good, but not great), the Xense is a top tier soundcard by itself, so this might be the cheapest option for both a soundcard headset.

I'm just looking for a soundcard right now in the 100$-200$ range, the headphones i'll snag later