The SB0770 (Sound Blaster X-Fi Xtreme Gamer) goes for just $18 shipped on eBay. They released drivers in early 2014 that fixed practically everything. For any bit more money though, upgrading from an Audigy 2 ZS ins't going to be worth it cost/performance, unless you have some serious high end gear.
FLAC, DTV, games, and movies sound fantastic on a mid-range Altec Lansing 2.1 system, and even on a decent
Lenovo headset-microphone combo. Playback at 24bit/129Khz without distortion is nice, and voice recordings at 24-bit/96Khz also is great for VOIP/gaming.
I haven't tried recording music straight into it, but if it was anything like my Audigy 2 ZS I'm sure it'll be fine. I don't believe anything better than the SB0770 is worth it at all. Immersion in games and movies from the SB0770 was great, too. If I didn't buy a used SB0880 ($48 on ebay) from a local computer thrift store for $4, I wouldn't have upgraded. I can't notice much of a difference between the two.