hi,
I use an audigy 2 zs and also have access to a system with a delta 66. I have recorded with both.
I have been able to get astonishing results with the audigy, at least for what it really is speced at, but the delta 66 has far better d/a a/d converters and better stable drivers.
I'm speaking strickly multitrack, one track at a time recording here not multiple inputs which the delta also has.
I think the 'trained ear' can hear the difference quickly between the 2 cards, especially early on in a project, before resampling a master.
it is easier to follow your work flow with the delta because it gives you more to work with from beginning to end. the audigy needs a few tricks of the trade to get good results mainly due to it's converters and poor wdm driver.
no problems with creative asio, seems rock solid. I wish it's control panel would give control of buffer size instead of just latency though.
BTW...when Eugene and the kxproject crew release driver 3537, you can bet that I will ditch the creative drivers and use kx. creative was not heads up about the hardware and the card is capable of more than it's current native driver allows...much more...for about $89.00 US.
cheers,
baba