Checking in.
I got out and recorded my first show using the M10. I had Milabs>Lunatec V3(optical out)>D50 for one rig, and Beyer MC950>Naiant littlebox>M10 for the other.
The Tascam DR2d I got last year for having a second/small deck and having 4ch capabilities was ok, but I was never that thrilled with the low input overload threshold. I'll keep it for the very occasional 4ch recordings I want to do, but the M10 is a much nicer deck.
I haven't really listened to or compared the Milab>V3 recording, but the mc950>LB>M10 sounds great. The M10 was easy to use -- very similar to the D50.
Sometime when I don't want to 2 separate rigs, I'll do a comp of the V3 A/D to the M10 A/D (mics>V3, analog out to the M10, digital out to the D50). I suppose I could use the littlebox sometime and do 1/8" out to the M10 and RCA out to the D50, and thus do a comp of the D50 to the M10.