What SS Dac , Bel Canto,Benchmark, ?????


I am looking to get a SS Dac for my system,currently have a Cal Sigma 2 ,would like to firm up the Bass and add better highs.My system consists of B&K avr307 receiver,Sony 222es cd player used as a transport and vandersteen 3A speakers.Thinking of a Bel Canto Dac2 or a Benchmark dac1,any other suggestions? My budget is about $700.00 max new or used is fine.
ls6454
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The more recent Benchmark dacs from about the last 6 months do not have the harshness of older units. I had the Bel Canto Dac in my system some time ago, and while my sonic memory isn't perfect, the Benchmark is much more resolving with lots more low level detail and better bass. Of course, YMMV.
Audioengr,

Any idea how to differentiate between the revised and older units? The face plate of the older units are larger than the revised ones? Or we can tell from the serial numbers?

Thanks in advance.