Run the R-09 @ level 8. Plug Chris's preamp into the line-in, and crank it up! Any more on the R-09 and you're getting an attenuated signal which will result in loss of quality. It might seem weird how high you have to go on the preamp, but don't be afraid to turn it up high and watch the meters on the R-09 screen. Mine usually peak around -15 to -10 dB.
Good luck!
EDIT: Sorry Chris, just read your post....was it 6? Maybe I'm remembering wrong...