live 10-25: very deep stack KK oop vs a lag

[mikech]

borgata 10-25 last night; the game was playing pretty tight until the villain sat down about an hour ago. he put ~20k on the table, and it quickly became apparent that the man was here to gamble. he was not utterly braindead (hence he shall hereafter be referred to as NUB), but he was dumb enough, and dangerous enough, that he was gonna either win or lose a lot of money. here are a few of the other hands he got involved in before my hand with him:

flop ATx checked around; turn makes a 3-spade board and sb fires 300, NUB calls; river o/s J and sb bets 500, NUB raises to 2k. sb calls with a 7-high flush, NUB shows KQ no spade.

flop 986, NUB bets 400, gets c/r'ed to 1400, he calls. turn is another 9, c/r'er leads 1k, NUB raises 2k more, c/r'er pushes for 6k total, NUB calls with T9. c/r'er's flopped straight holds up.

he also bet 500 on the river on a 4-diamond board with the 9d and paid off a c/r to 2k by the ace of trump. and just a couple hands before my hand came up, he put in 4k preflop with JJ and spiked a set to bust AA.



ok, sorry for the long preamble but i wanted to give all of you the same info i had: basically, he was ready, willing, and eager to put his money into play. so anyhow, we're 7-handed at the time, utg with a 3k stack limps, NUB limps on the button, i make it 200 straight from the sb with KK and 10k behind, utg and NUB call.

flop is 876 all spades, i have the K of spades. how should i proceed in the following situations:

scenario 1) i bet 350, utg folds, NUB makes it 1k to go. i do what? if i decide to play on, what card(s) would i like to see on the turn? what is my plan for the rest of the hand?

scenario 2) i check, utg bets 250, NUB makes it 750. i do what? if i decide to play on, what card(s) would i like to see on the turn? what is my plan for the rest of the hand?