Totally player dependant. If you think that you're gunna get snapped off by 44 and K9 then you should be shoving pretty tight.
I much prefer raise/folding than shoving in this spot, assuming that the guy isn't good enough to just jam 100% over our raise or bad enough to flat us a lot.
make it 16000 and fold if he shoves. Chances are he will shove or fold incorrectly and you auto-profit.