Apogee Duet vs. Motu Ultralite

[Chris Sewell <lunamusic@mac.com>]

So I picked up an Apogee Duet this week. It does sound really, really  
good. I did some back to back tests with my Ultralite. It has a much  
more full sound, with tighter lows and a nice warmth too it. Very  
impressive sound. Its nice to have a control panel for it right in  
Logic and Mainstage. The breakout cable doesn't bother me much,  
you're gonna have cables connected to it anyway, so it's not that big  
a deal. I miss having a midi interface built in. I would imagine the  
Duet II will include this.
The only real problem I have with it is when using it with Ableton,  
I'm getting some pretty crazy latency issues. It defaults to 512  
samples in the buffer when you first connect it, and I was  
experiencing latency of good 1/2 second. Bringing it down to 256  
didn't make a difference initially. I then have to unplug the Duet,  
then turn it back on, and restart Live for the change to kick in. It  
then improved greatly. But adding devices to a channel sometimes  
would knock back out of the setting. Although the buffer remained,  
the long lag would reappear, requiring another restart. Very weird. I  
made sure the drivers were the latest versions, but this still  
occurs. I was getting frustrated so I plugged the Ultralite back in,  
thinking I would return the Duet. I immediatly missed the sound of  
the Duet. I don't think I can go back.
Does any one have any idea why it seems so sensitive to any changes I  
make in Ableton?

Thanks
Chris