EVGA designed a new audiophile-grade sound card in cooperation with British audiophile hardware maker Audio Note. Sold under the EVGA brand, the NU-Audio card is a full-height PCI Express 2.0 x1 device with a fancy design.
At its heart is an XMOS xCORE 200 PCIe audio processor with an Azalia-like pipeline. The main DAC is an Asahi Kasei AK4493, fronted by an Analog Devices OP275 OPAMP for the main headphones channel, and AD8056 for the line-out channel.
The card has as serious input chops as output, with the main line-in powered by an Asahi Kasei AK5572, and a Cirrus Logic CS53456 for the microphone-in channel. As an analog sound card, you only get 2 channels. You'll need optical TOSLINK for 5.1 channels.
Full details at TechPowerUp. Pricing and availability is unknown, but expect it to be rather expensive.