So I'm a noob when it comes to sound cards, what's the best, and what software to use.

I have my Hero Alpha, and it supposedly has great audio on the mobo. I use Sonic Studio II and it seems to work great, sounds great, etc (for what I know). I only use headphones when gaming, then my 5.1 Logitech speakers for everything else.

Well, what outperforms the SupremeFX/Sonic Studio II motherboard audio/software? Willing to spend around $100.

I'm looking for a sound card that will just.. be better. I understand I need good headphones to actually benefit from the sound card.

If I get a certain sound card, am I forced to use their audio software, or can i stick with Sonic Studio II or software of my choice? I know I'd need the drivers. But for full benefit, is it suggested to use their software?

I'd need 3.5mm headphones, and NOT usb, 'cause I want to go through the sound card, correct?

Basically, what are the do's and don'ts?

Anyone know a good sound card/software/headphone combo?

I see the $100 Creative Sound Blaster Z SBX - I'd need to use their software? Or no?
Then I'm looking at the Asus Xonars, many different kinds. Which software works with this?

Thanks!