I use Both,
Tascam HDP2 and Edirol R4, i find both bang for the bucks kind of recorders ,
i live in the tropics , so the weather is pretty humid and rainy... actually we only have 2 stations summer and rainy seasson ,(Panama City, Latin America)
i find Edirol a little stronger in that aspect Vs the HDP2, the Edirol its a little more rugged and it has 4 channels, of course i have both living inside Porta braces with portabrace raincoats included for both machines.
Tascam is a little touchy about conecting phantom mics with the phantom on ,, you could blow one of the channels (like i did with my first HDP2), but the operating system is more dedicated and it feels actually like a decent recorder for a production mixer.
VS edirol "Synth" Type of operating system, (the whole thing looks like a JV Roland Synth module). and some times get very obtuse chopping takes while you press pause and the record again it would give you a whole file (even if you press pause and start recording again) but it does record hifi audio
if you use the right mics. 96Khz
unlikely the HDP2, whenever you hit pause, the takes actually change while you do it,
that way you dont end with a 262M file with all your takes on it.
"sausage style"
and then have to chop it in your laptop.
i feed them input from Schoepps,Sennheiser and Lectrosonics Lavs
truth is,
i always take both to wherever im recording
and both had given me good results
within Film production or XDCam video, or pure
raw 192 Khz
bat recognition fidelity for freaks like myself.