Metronome s/s or tubed version? Do you need or want upsampling? Balanced outputs? The CD 1 (correct me if I'm wrong) might not offer balanced outs, which you will need and doesn't offer upsampling, however, the CD 2 does.
Metronome is a fine product but so is your 506. May not be worth spending the xtra $ unless you require or want the xtra features, (upsampling) or an overall change in sound, (tubed version).
my 2 cents.....
Metronome is a fine product but so is your 506. May not be worth spending the xtra $ unless you require or want the xtra features, (upsampling) or an overall change in sound, (tubed version).
my 2 cents.....