I was planning to pick Roland R88 mixer/recorder. Still very confused between this and Tascam P82. I am unable to decide between for the cost difference. There arent any users review online. I intend to use it on Production Set for movie rentals. Wouls this be an over kill or kill joy for the work aimed.

Also wanted to know what's the dynamic range of roland r88

Not easy to measure. I just bought an R-88 and I can tell you the preamps are really quiet, quieter than my MOTU Travaler mk3 and much quieter than my Tascam DR-70D. What did you get in the end?

FWIW: Stated Characteristics Residual Noise Level
(IHF-A) OUT 1–8 -80 dBu or less ([LEVEL (INPUT/MIXER)] knobs = -infinity)
MIX OUT -90 dBu or less ([LEVEL (INPUT/MIXER)] knobs = -infinity)
Total Harmonic Distortion + Noise 0.02 % or less ([SENS] knob = +4 dBu, [LEVEL] knob = 0)
Frequency Response 20 Hz–40 kHz (0/-3 dB, Sampling frequency = 96 kHz–192 kHz)

Download the manual/specs here: Roland R-88 Manual/Support (http://roland.com/support/article/index.cfm?q=manuals&p=R-88)

As I mentioned the JW Sound group in another post, I recall a few R88 discussions there.