I'm looking for an ASIO sound card which I would be using in both Windows and Linux (dual-boot). It has to work flawlessly in Windows, and I would prefer it to work fully in Linux as well. However, I can live with a card that has some features disabled in Linux, as long as basic playback and recording works, I don't have to install any proprietary drivers, it works reliably, and is hassle-free (i.e. no configuration to get regular sound working, and none of that "has to boot in Windows first before it works in Linux").
I would prefer a PCIe card, and although I would be using this mostly for playback, I also want recording to work. I'm using Debian. Price range: less than 150€.