Thanks for all the very interesting information. I opted for the 24Bit/44Khz setting on the Tascam DR-2d. I have to say, though, that this unit is the most twitchy portable digital recorder I've used as far as getting good recording levels. I 'think' I finally have a setting that works (and I'm using the "safety" track Dual Record at -6 dB lower). I thought I 'still' noticed an artifact or two where my guitar sent the level too high for a brief period. I'm close to returning the unit frankly as I never had issues with any of the Zoom recordings like this unit.
Regards, Paul