HagUSB vs Other USB Interfaces/Devices


Hi all. I have three quick questions regarding the HagUSB:
1. how does it compare to other USB interfaces, in particular those with true ASIO support (Edirol, M-Audio etc.)
2. does it provide bit perfect output (i.e. does ASIO4ALL provide bit-perfect output even though it still uses the OS)?
3. I currently have an Edirol UA-1EX which I used as both an interface and DAC (used it analog outs). I now got myself a DAC which has both optical and coax input. The Edirol is going to another PC so I want to get either one of those interfaces like the M-Audio Audiophile USB, but have read that the HagUSB is superior (even though it does not use true ASIO and only supports 16-bit). Is it a good "upgrade" to the UA-1EX?

Cheers,
X
xenithon
Herman - Yes, even my USB DAC and converters will be detected by Windows and it will try to load the native Windows driver, but I recommend against this. The Windows driver is a bad sounding driver. Better to use the custom driver provided for that hardware (as for my Off-Ramps), use the drivers from http://www.usb-audio.com/ or at least use ASIO4ALL if the existing driver will not support ASIO.

The driver is the most important software part of getting a world-class sound, followed by ASIO and upsampler.
I wreckon I'll try get another interface for the other PC and keep the Edirol on this one. It has great ASIO drivers - easy to use and very stable. At a later stage I may look into upgrading it but will try make sure it has ASIO drivers.
I'm trying this USB-Audio driver out. It does sound better than the freeware versions(ASIO4all.etc) without a doubt.

Problem is it only works with Foobar. All my other devices are muted like Winamp. I like the internet radio and video features of Winamp. I can't seem to use any of them.

Anyone know how I can get this driver to work with Winamp?

Any help is much appreciated
Does this mean that even a next generation DAC which comes with a USB input will receive corrupted data unless one also tinkers with the Windows operating system and drivers?
xenithon,
sorry to ventrue off topic. but i am wondering how the edirol UA-1EX sounds. i have heard good things about the previous edirol UA-25 but am curious about the UA-1EX. i am looking for a cheap interface that sounds pretty good to hook up to my external dac. have you used the UA-1EX without the D/A function?
thanks
jared