yeah, a good reciever should work. I'm not up-to-par with the xBox's capabilities, though, in regards to Dolby encoding . . . but, still, you don't need Dolby to make use of a good reciever. a highly quality reciever should be able to properly mix the channel output . . .
Regarding an EAX capable card - TBH, if you're going to go with a full-blown reciever setup, with optical or digital SPDIF connections . . . I'd recommend an Auzen X-Fi. Audio quality is much better than 95% of Creative's line up, you'll have EAX 5.0HD support, as well as Dolby encoding and decoding . . . plus Creative's proprietary software features, like CMSS-3D (which is the best speaker virtualization solution I've heard) which can make even 5.1 or 7.1 setups sound completely amazing. The cards aren't as fast as Creative's X-Fi equipped cards, but in today's age, the slight difference between the two isn't noticeable.
Auzens are a bit more expensive, but if you're going to have a killer setup, a killer quality card is defi worth it's value
Either way, skulking about The City will never sound better!
Regarding an EAX capable card - TBH, if you're going to go with a full-blown reciever setup, with optical or digital SPDIF connections . . . I'd recommend an Auzen X-Fi. Audio quality is much better than 95% of Creative's line up, you'll have EAX 5.0HD support, as well as Dolby encoding and decoding . . . plus Creative's proprietary software features, like CMSS-3D (which is the best speaker virtualization solution I've heard) which can make even 5.1 or 7.1 setups sound completely amazing. The cards aren't as fast as Creative's X-Fi equipped cards, but in today's age, the slight difference between the two isn't noticeable.
Auzens are a bit more expensive, but if you're going to have a killer setup, a killer quality card is defi worth it's value
Either way, skulking about The City will never sound better!