I just bought a Transcend 16 GB 133x CF card for my Deva 5.8 for $83. I have it working doing simultaneous record/mirror with 8 channels at 96 kHz, without too much lag*.
I've been tempted to see how well the Samsung 32 GB cards work, but you can buy multiple 16 GB cards for the price of a single 32 GB card right now. Maybe after the prices fall a bit I'll try.
* The Deva's multi-record function works a bit differently, the initial audio goes on the hard drive, then audio is "mirrored" onto the CF card. It puts as much data as it can on the card as fast as it can, but depending on the number of channels and sampling rate, the mirroring function can get behind. When this happens, you don't loose any data, it simply takes it a while after pressing stop for the remaining data to write to the CF card.
Wayne
Wayne