5CD: HH-made my hand. raise or try for overcall?

[Big Limpin]

Button is solid regular, SB is unknown, seems fishy
Raise him, or call to get overcaller + minimise damage when i'm not best?

Limit 5 Card Draw ($1/$2) (converter)

SB ($36.50), Seat 4
Hero ($50.70), Seat 5
UTG ($98.90), Seat 6
CO ($14.15), Seat 1
Button ($89.80), Seat 3

SB posts $0.50. Hero posts $1.

Hero is BB with [8s Qc 7d Tc 9c] "open ender. pot odds baby!"

Round 1: (1.50 SB)

<font color="#666666">UTG folds. </font><font color="#666666">CO folds. </font><font color="red">Button raises. </font><font color="green">SB calls. </font><font color="green">Hero calls. </font>
SB takes 2. Hero discards Qc . Button takes 1.

Hero has [8s Jd 7d Tc 9c] "boom! headshot!"

Round 2: (3.00 BB)

<font color="red">SB bets. </font><font color="green">Hero calls. </font><font color="green">Button calls. </font>

Pot: (6.00 BB - $12)

Results: (in white)

<font color="white">Pot: $12, (including rake: $1)

SB shows [ 6H,AH,5S,QH,AS ]
Hero shows [ 8S,JD,7D,10C,9C ]
Button mucks cards [ KS,KH,QD,4C,4S ]
</font>

Note that if i get no overcall (-$2), i save 60cents in rake. So i'm not losing a full bet if it dont work.
...so, i smoothcall, and get my overcall. Not sure i like it though, in hindsight, cause i'm positive i beat SB, and i'm 95% sure he instacalls. he seems that kind of player. what say you?