>can only find one negative thing... The lack of EAX support
The Asus A7V600, P4C800, P4P800 and the Intel D865GBF uses SoundMAX which has EAX, A3D and Virtual Theater which is the equivalent of Dolby Digital. So if games/DVD's and onboard sound is important then consider one of these or one that has SoundMAX.
About SoundMAX from Analog Devices
SoundMAX Digital Audio Systems from Analog Devices are premium-performance PC audio solutions that exceed the functionality of sound cards. Offering outstanding audio quality and state-of-the-art technologies for playback of music CDs, MP3/WMA files, DVD movie soundtracks, MIDI music, Internet audio and enhanced game audio, SoundMAX delivers the ultimate audio experience on today?s PCs for business professionals, audio enthusiasts, musicians and gamers.
SoundMAX offers a flexible feature set, giving PC OEMs, motherboard manufacturers, and integrators the opportunity to customize the functionality of their audio solution. Residing on the PC?s motherboard, the SoundMAX-class of audio CODECs are available in both 2- and 6-channel configurations and offer variable sample rate conversion (SRC), professional quality 103-dB output with 94-dB SNR, software-configurable speaker EQ, and analog enumeration capability. Integrated into the PC?s audio subsystem, the SoundMAX feature set includes a state-of-the-art DLS2 MIDI synthesizer with the popular Yamaha DLSbyXG sound set, the award-winning Sensaura 5.1 Virtual Theater? surround sound, and support for all major game audio technologies, including Microsoft DirectX? 8.0, Microsoft DirectSound 3D?, A3D, MacroFX, ZoomFX, MultiDrive 5.1, A3D, EAX and SoundMAX SPX?