couple questions about a $55 hand

[chumdawg]

***** Hand History for Game 2446892050 *****
100/200 Tourney Texas Hold'em Game Table (NL) (Tournament 14379517) - Sat Jul 30 01:07:02 EDT 2005
Table Table 22362 (Real Money) -- Seat 10 is the button
Total number of players : 5

Seat 2: chumdawg3 (1820)
Seat 5: atkalk (1740)
Seat 6: brieb23 (700)
Seat 7: viper090378 (4135)
Seat 10: richc004 (1605)
chumdawg3 posts small blind (50)
atkalk posts big blind (100)

** Dealing down cards **
Dealt to chumdawg3 [ Ah, Kh ]
brieb23 folds.
viper090378 raises (200) to 200
richc004 folds.
chumdawg3 calls (150)
atkalk calls (100)

** Dealing Flop ** : [ 8s, Ks, 5d ]
chumdawg3 checks.
atkalk bets (150)
viper090378 calls (150)
chumdawg3 raises (1620) to 1620
chumdawg3 is all-In.

Big stack open minraises. Do I consider anything else preflop?

Fantastic flop for me, I would think. Should I lead out at it? I expected the BB to check and the big stack to make a continuation bet. I planned to check/call or check/push depending on the size of his bet. When the BB led at it weakly and was smooth-called, I decided it was time to take this down now. Anyone play it differently?

If the BB checks and big stack leads 200 or less, do I smooth call and try to get more chips in on a non-spade turn?

Finally, what percentage of the time do they both fold to my check/push?

Thanks for advice on any aspect of the hand.