[PD] Can anyone tell me not to buy a Quattro or a UA-20?

[Dan Wilken]

List,

I'm looking to buy a sound-card. According to past posts on the list, 
both the Midiman Quattro and the Ediroyal UA-20 seem like good options 
with reliable Linux and OSX experiences. Has anyone had recent 
experience to the contrary? Is there another 4 channel I'm overlooking? 
PD, Jack...

Has anyone unplugged these during a performance and moved them to 
another machine, leaving the original behind playing through the PCI 
(or built in) card? Mac and Linux.

Also, do either of these reduce CPU load? Do the PCI cards do this more 
effectively? Enough so to change my mind?

Thanks in advance,
Dan