Bel Canto Dac 2.5 vs 1.7?

Any feedback on choosing the Bel Canto Dac2.5 vs 1.7? (assuming they are the same price)

From the spec sheet some of the differences are:

Maximum data rate for USB input:
  DAC 1.7: 24bit/192khz
  DAC 2.5: 24bit/96khz

Master Clock jitter:
  DAC 1.7: 250 femtoseconds RMS, 100Hz-1MHz
  DAC 2.5:  2,000 femtoseconds RMS (2 picosecond )

The 1.7 (and 2.7) also has a new headphone amplifier design.

Thanks for any feedback!