I'll vouch for the Berkeley DAC combined with the Lynx soundcard (which cost nearly as much as the Dell computer I am using as the server). I've had this set-up for several months now, and I no longer think about upgrading my digital source, which is a first for me. The only upgrading I am going to be doing is getting more storage space for my hard drive (and backup external hard drive) as I continue to transfer my music over from CDs into FLAC and WAV files.
FWIW, the BADA DAC is great straight into the amp, but I actually prefer having my fully loaded Audio Horizons preamp in the chain. You can try it with your Aesthetix and see if you prefer the sound with or without. You may find that you end up running the Berkeley directly into your amps, in which case you could sell your preamp, recouping most if not all of your investment.
Good luck!