Bets device for quality?
 

I want to shoot best quality especially for some ultra slomo (using MOTION Optical Flow in post) and thought either the ATOMOS Samurai ( The Samurai - HDMI ProRes HD/SD-SDI Recorder ) or this BM device would help to that end - Blackmagic Design: HyperDeck Shuttle Tech Specs

Which is best for shooting with my EX1R and would I have to compress the footage to Pro res before editing in FCP 7 if I shot using the Black Magic device? Is it true the higher the bit rate (100-220 or so) will make ultra slomo far easier/cleaner/better than if just shot at EX1R's normal bit rate?

Danke
K