Commerce 5/10, TPGK, out of position, awkward stack sizes

[elena_elphie]

I tend to have a problem where I flop a decent but possibly beaten hand out of position (like TPGK) out of position when the stacks are around 60-70BB or so. If I have 40BB, I generally am comfortable putting all my chips in, and if I have 100BB or more, I can often get away if I am beat. Here is a hand from today:

I am two off the button w/ KQs, one limper in middle position, I raise to $50. The cutoff, a fairly weak player that will chase draws w/o odds and cc w/ all sorts of hands calls. Everyone else, including the limpers fold, we each started with around $650 and the pot now has $120.

The flop comes K85 w/ two clubs. I bet $80 and the villain calls, he could have all sorts of things here, flush draw, straight draw, set, two pair, top pair, middle pair etc.

Turn is an offsuit 7. I bet $200 and he calls again.

What do I do on the river if:

a) a blank falls
b) a flush card hits.

At this point we each have around $350 left and the pot is
about $640. Is there a different way to play the hand to avoid this awkward situation?