Flopping a set on a flush/str8 board

[FreakDaddy]

Villian plays a lot of hands, but he's reasonable. Wouold you raise flop more? Just flat call instead. Comments appreciated.

Game #994328914: Texas Hold'em No Limit ($0.15/$0.25) - 2005/09/27 - 02:52:31 (ET)
Table "Sadko" Seat 7 is the button.
Seat 1: ltjdangle ($19.50 in chips)
Seat 2: nate_dogg ($10.35 in chips)
Seat 3: HERO ($36.55 in chips)
Seat 4: aco26inf ($29.75 in chips)
Seat 5: Sounami ($35.55 in chips)
Seat 6: Evenflown ($9.72 in chips)
Seat 7: pdwells ($27.42 in chips)
Seat 8: X ($55.56 in chips)
Seat 9: Risky_B ($23.60 in chips)
Seat 10: Kokka ($27.05 in chips)
Apache001: posts small blind $0.15
Risky_B: posts big blind $0.25
----- HOLE CARDS -----
dealt to HERO [4s 4h]
Kokka: folds
ltjdangle: calls $0.25
nate_dogg: calls $0.25
HERO: calls $0.25
aco26inf: folds
Sounami: calls $0.25
Evenflown: folds
pdwells: calls $0.25
X: calls $0.10
Risky_B: checks
----- FLOP ----- [5d 4d 3d]
X: bets $2
Risky_B: folds
ltjdangle: folds
nate_dogg: folds
HERO: raises to $5
Sounami: folds
pdwells: folds
X: calls $3
----- TURN ----- [5d 4d 3d][8s]
X: checks
HERO: bets $7
X: calls $7
----- RIVER ----- [5d 4d 3d 8s][Qh]
X: checks
HERO: checks
----- SHOW DOWN -----
X: shows [As 2h] (A Straight, Five high)
HERO: mucks hand
X collected $24.50 from Main pot
----- SUMMARY -----
Total pot $25.75 Main pot $24.50 Rake $1.25
Board [5d 4d 3d 8s Qh]
Seat 1: ltjdangle folded on the Flop
Seat 2: nate_dogg folded on the Flop
Seat 3: HERO mucked
Seat 4: aco26inf folded before Flop (didn't bet)
Seat 5: Sounami folded on the Flop
Seat 6: Evenflown folded before Flop (didn't bet)
Seat 7: pdwells (button) folded on the Flop
Seat 8: X (small blind) showed [As 2h] and won ($24.50) with A Straight, Five high
Seat 9: Risky_B (big blind) folded on the Flop
Seat 10: Kokka folded before Flop (didn't bet)
****HAND ENDS****