The DAC2 sounds the same as the DAC3 as stated by Rory Rail at Benchmark. I have had both and would agree.
I recently sold my DAC3B because I had too many DACs. The DAC3 and DAC2 are both a bit hot on top. If you have a warm system, the DAC2 could be a great choice. For $500 that is a great choice.
I used 3 Sonore Optical Rendu streamers for my 3 DACs. I have 2 DACs now and an extra streamer, if you are interested.