I run a couple of setups. (see updated sig)
SB3 as a standalone (much better now with a new linear, regulated PS)
or
SB3 --> Denon DA500 DAC
or
Denon DVM 3700
Don't get me wrong, they all sound pretty damn good but I've unfortunately been spoiled by hearing a couple of really nice rigs in the last year. I'm currently working on plans for a standalone DAC to couple to both a CD transport and the SB3. I hope to have it done some time mid-summer. And for the record I'd qualify just about any of the sources I've heard in the sub-$1000 bracket as mid-fi so it's not really a dis on the Denon gear.