The G430 is a $30 headset, a 'decent' set of headphones would cost about $60-70, and by decent i'm not necessarily only referring to sound quality, but also impedance, or how much they take to drive.
It's not about cost, it's about whether it's worth slapping a sound card on them.
Your headset is low impedance, and therefore does not need much to power it. My point is money on a sound card would be wasted.
Take away the cost of a mic too and the actual amount spent on audio quality is tiny, and it shows.
I run a store mate, don't lecture me on 'if it costs more it must be better', you're the one spending money on a sound card you won't notice a difference with here. I get parts at a discount, that's why my system has a kraken in it, and quite a bit was won from competitions. Personal situations, and not at all relevant to you, stick on thread topic, no personal attacks here.
I'm only trying to help you, amusing given you choose to indeed listen to the person with 7 other solutions. This isn't about me, it's about you.
Do what you want, if you want to be pompous and only hear what you want to that's your choice, but i'm just putting info out there, take an ear to listen.
Think of it as buying a $500 laptop and then slapping a diamond studded case skin onto it.