Your alot better off cb the flop b/c this line looks alot like air if you fire river since the only hands that would fold are ace hi's and missed str8 draws perhaps with this line betting half pot on river looks like value to get an ace hi to fold. Also you have alot of showdown value over missed str8 draws so ck on the river isn't bad either.

Id like you guys to also comment on my ranging of his hand by the river….He is playing 15/12, called LP raise from an active player, and then checked flop, check/called turn, and checked river.  Based on this what can he have?  I discard all 2 pair or better hands based on his river check (no indication he is tricky), there are basically no draws that got there except A3 which he would have bet, and this tight of a player rarely calls with hands that have an 8,5,4 or 2. so I dont see many hands he can have other than A7+, KQ, KJ, 66 77 most of .   For this reason I decided to Bet  5200 into  a 7680 pot, I know I am not repping much but it seems to me I have a much better chance of having a pair vs his range of hands,  Am i wrong here? 

results to come.