What Is The Best Sound Card For Recording Music?

Oh my God... No, not Creative.  Not the Audigy, not *anything* in the Sound blaster range.

Look, I'm not an expert here, but seriously, if you want to record music then invest in something by M-Audio, like, the Audiophile 2496, the Audiophile 192, or (as I'm about to buy for my Mac) the M-Audio Revolution 5.1 (avoid the 7.1 unless you really need the outputs, as the 5.1 has a much better DSP on it, surprisingly).

There are plenty of 2496's and 192's on eBay, and there are R-5.1's as well, but it's actually almost the same price to buy one in a shop atm.

I hope this helps you out.

Say I use the M-Audio Delta 1010-LT, do I need to use any of the inputs on the card? Or can I continue using USB and still experience improved latency?

In my opinion, Creative Sound Cards are good for recording Music. I am giving you a website from where you can find a range of sound cards.
computers.pricegrabber.com

Depending on your budget, Audigy cards from Creative have always been my choice.