100NL TPTK turn decision

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
9 players
Converter

Stack sizes:
UTG: $97.95
UTG+1: $119.20
MP1: $71
MP2: $214.60
MP3: $51.35
Hero: $108.45
Button: $152.80
SB: $101.65
BB: $42.80

Pre-flop: (9 players) Hero is CO with K A
5 folds, Hero raises to $3.5, Button folds, SB calls, BB folds.

Flop: 5 K 8 ($8, 2 players)
SB checks, Hero bets $7, SB calls.

Turn: Q ($22, 2 players)
SB checks, Hero ???

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SB is a 33/4/1.45 over 100 hands.

What's your move here?

If the turn was the Q of hearts instead (completing the flush draw), how would your play change?

I bet $12. Probably the same if it's the Qh since you'd have the nut flush draw on the river, but checking behind isn't bad either.

bet 17 check behind any river