My experience with Realtek drivers (audio (Azalia ALC889) and NIC (8111E) specifically), and M-Audio drivers (specifically the Revolution 5.1 and 7.1 cards) has been disappointing. If you want me to list off all of the bugs I've found over the years (and in some cases still experience + can reproduce very easily), I'll be happy to. But that's kinda outside the scope of the thread I think. :-)
All I know about the Asus Xonar DG series is that, as indicated by my blog post + Youtube video showing the problem, MME support in those drivers is of questionable quality, but DirectSound works reliably no matter what I do to it. None of this is Khaled's fault of course, but it might be time to consider deprecating use of a technology (MME) which is from the days of Windows 3.1 and instead going with DirectSound. It would increase compatibility with cards which do have wonky MME support. mIRC has already thrown out support for Windows 9x, so I wouldn't think going from MME->DS would be that detrimental of a thing (to users/customers).
