It appears your system is extremely revealing. The bel canto will warm up the sound while the benchmark will offer even more resolution. The high frequencies will be more pronounced on the benchmark.
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I've owned both the Benchmark DAC1 and a Bel Canto DAC3 (sorry, I know this isn't the DAC2). Personally, i learned I couldn't pair either of those with a solid state setup as I found both very analytical/revealing, and that was with a "warm sounding" Musical Fidelity A308 integrated and a pair of Quad 22L2 speakers at the time with Cardas Golden Reference ICs. The Bel Canto was a bit "smoother" with a little more low end grip, but truthfully to me it was more similiar to the DAC1 than different.
Another option to mention is a tube DAC of some sort but at least you could easily resell the Benchmark or Bel Canto if bought used to try for yourself.