How to play: Possible Freeroll Oppurtunity with TP on 3 Flush

[Tilter]

So here a predicament that came up twice in tourneys I played today

PokerStars Game #13179689769: Tournament #65928058, $20+$2 Hold'em No Limit - Level V (75/150) - 2007/11/11 - 15:33:02 (ET)
Table '65928058 17' 9-max Seat #8 is the button
Seat 1: mattymat (4065 in chips)
Seat 2: Bobkat513 (2660 in chips)
Seat 3: BarneyR2005 (2750 in chips)
Seat 4: caecilius (5185 in chips) is sitting out
Seat 5: Tilter (8160 in chips)
Seat 6: kgbs_place (5840 in chips) is sitting out
Seat 8: rayjay777 (4540 in chips)
Seat 9: Karoly_NL (15395 in chips)
Karoly_NL: posts small blind 75
mattymat: posts big blind 150
*** HOLE CARDS ***
Dealt to Tilter [As Jd]
Bobkat513: calls 150
BarneyR2005: folds
caecilius: folds
Tilter: calls 150
kgbs_place: folds
rayjay777: folds
Karoly_NL: folds
mattymat: checks
*** FLOP *** [Ah 4s Qs]
mattymat: checks
Bobkat513: bets 450
Tilter: calls 450
mattymat: folds
*** TURN *** [Ah 4s Qs] [Ks]
Bobkat513: bets 450
Tilter: calls 450
*** RIVER *** [Ah 4s Qs Ks] [5c]
Bobkat513: bets 600
Tilter: calls 600
*** SHOW DOWN ***
Bobkat513: shows [Jh Ad] (a pair of Aces)
Tilter: shows [As Jd] (a pair of Aces)
Bobkat513 collected 1763 from pot
Tilter collected 1762 from pot
*** SUMMARY ***
Total pot 3525 | Rake 0
Board [Ah 4s Qs Ks 5c]
Seat 1: mattymat (big blind) folded on the Flop
Seat 2: Bobkat513 showed [Jh Ad] and won (1763) with a pair of Aces
Seat 3: BarneyR2005 folded before Flop (didn't bet)
Seat 4: caecilius folded before Flop (didn't bet)
Seat 5: Tilter showed [As Jd] and won (1762) with a pair of Aces
Seat 6: kgbs_place folded before Flop (didn't bet)
Seat 8: rayjay777 (button) folded before Flop (didn't bet)
Seat 9: Karoly_NL (small blind) folded before Flop

Besides forgetting to raise the limper preflop. On the flop I have top pair with a good kicker, and my line is just to let him do the betting. Now the turn comes and he leads, this seems like a good spot to shove now and take him off possibly the best hand. What if his stack was the same size as mine, put in a raise but then fold to a 3 bet (assuming the odds are no longer their).

The other situation was when I had AxQc and board came out Ac7c2x8c, should I put in a raise here?

So the main question is should I continue to call down and not play a big pot, or stick it in with the semi-bluff draw (possible freeroll).