I am rather wary of the "F-Series Technology" statement they make about the preamps and especially the 132 dB dynamic range claim. Think about the price point of these units and the compromises made in the preamps of comparable models. The -127 dB EIN looks good, but they do not list the P48 current supply for these "Studio" recorders, and it's doubtful they do as well as the F-Series. This could be a concern if you have power-hungry mics, and the current demanded from mics can fluctuate with SPL changes. Consider these different phantom current specs:
F6 and F8: Up to 10 mA to each input (these are the only models where Zoom is up to standard)
F3, H1 XLR, and H4 Essential: Combined channel total of 10 mA or less (probably OK with the F3 and H1 XLR, but the H4E is awful here, supplying a max of 2.5 mA to each of 4 mics)
H6 Essential: Channel total 32 mA or less (roughly equivalent to the F3 and H1 XLR)
Zoom also only lists A/D dynamic range for the inputs of the F8, at 113 dB(A). That's a decent number, but I wonder how much lower the figure is in the cheaper models where it's not listed. It's a dead horse beating that bears repeating around here: slapping multiple ADCs in there with 32-bit float recording doesn't fix preamps that are underpowered and noisy. The noise will restrict dynamic range on the low end, while not enough current will restrict dynamic range on the high end.
Of course I might be dead wrong about the Studio line, and the preamps are dead quiet with lots of current on hand. But the lack of any data from Zoom in these areas combined with what we know of their similarly-priced models makes me think the 132 dB dynamic range claim is misleading at best.