Thanks, specs of Tascam seems far better compared to Edirol, but I don't like the sound of the 680MKII, to my ears it is not so pristine as I expected.
I'm listening recordings posted, is there also a classical concert or other acoustics instruments recordings on internet to understand the tone of this recorder?
I don't like also the sound of the Zoom, to high...and Sound Devices is too expensive.
EDIT:
On ebay, in Europe, I can find only standard R44, there aren't modded units, is there a lot of difference in quality?