" its not good as Creative SoundBlaster. "
I would ask them to prove that it's better. I'm guessing they would have nothing for you.
I can tell by your speakers and headphones that you like high quality audio. However, I believe you wouldn't hear any differences unless you're currently getting static or something like that.
It's possible that the creative labs card could offer a tiny performance difference in gaming.
This is what Techspot had to say about it:
"A sound card may lighten your CPU's load, but that hasn't translated to conventional performance gains -- definitely not in a consistently meaningful way. PassMark's 15-minute BurnInTest recorded nearly identical results on both setups with the fraction of an advantage actually leaning in the Realtek's favor. Far Cry 2 and Dirt 3 didn't benefit either, though neither are CPU-intensive."
Then went on to say:
"The sounds from my integrated chip bleed together. Muddy, shallow and flimsy are all fair descriptions of the Realtek's audio, while the Xonar DX is comparably crisp, open and punchy. Shifting from low to high-resolution video seems like an apt comparison as it often feels like I'm moving from 480p to 1080p or perhaps 1080p to 4K..."
-techspot.com