Actually, I found an amazing deal on the Xonar DS:
For $29.99 AR these are fantastic. They won't sound as good as the C-Fi Titanium, but they are $40 cheaper so it will fit nicely in your budget. Again, I would spend the extra $40 because the sound difference is worth $40. The Xonar DS is more of a music/movie sound card, but I have used it in 2 budget builds so far and they sound great for games too.