Electronic Musician reviewed a bunch of field recorders, including the the Marantz 671, Marantz 660 and the Edirol R1 among others.
Basically, they panned the Marantz 671 (successor to the 670, which I love) for having firmware issues causing the mic preamps to be noisy. The Edirol R1 came out on top of the two Marantz units. Though I would really call the article a “introduction” to field recording. They do not list exactly what they tried to record, and with what. We all know that the microphone is key to getting a good recording.
I would totally recommend the Marantz 670. I used it this weekend and got some great recordings putting it about 6 feet infront and 7 feet above the band. Of course using my Rode NT4 mic (awesome piece that it is).
I imagine the issues with the 671 have been fixed. I would take the EM article with some grains of salt. The reviewer used these units to record a snare drum (why??), the “ambience in a suburban neighborhood” (um, ok), and dialog. Ok, great tests there. NOT.
Oh, and EM was reporting, like it was news, that Sony introduced a new format called MiHD. Um, guys, these things have been out for OVER A YEAR. Get with the program!