I get 224kH/s on my MSI GTX 660 (non-TI) with optimal settings and a good overclock with maximum powertune.
Settings: -l K10x16 -i 0 -m 1
While I use the machine, I can set the card to minimum powertune, slight overclock on engine clock, use -i 1 of course, and still get 170kH/s. Real power is at 77% of nominal, at a very efficient 0.962V figure for voltage.
Keep up the good work! I am considering a donation
Add: Just tried the -H 1 parallelization. Together with a more parallel K5x32 it got me to 180kH/s, with interactive powersave settings. My UI now is a tiny bit less responsive and CPU load is somewhat higher, though.