Stud/8 tourney hand: aces up vs. open pair of fives

[MarkGritter]

Value-bet the end here? Take the free showdown because Villian will only call with the low or a better high hand?

A more general question: do you play big pairs any differently in a tournament situation than a ring game?

Tournament - 7 Card Stud High-Low - Level III (50/100), Ante 10, Bring-In 15 (converter)

Hero: 1,581
Seat 2: 756
Seat 3: 1,401
Seat 4: 1,811
Seat 5: 1,361
Seat 6: 1,692
Seat 7: 1,490
Seat 8: 1,908

3rd Street - (1.60 SB)

Hero: A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img]___raises
Seat 2: xx xx 9[img]/images/graemlins/club.gif[/img]___folds
Seat 3: xx xx 7[img]/images/graemlins/heart.gif[/img]___calls
Seat 4: xx xx 2[img]/images/graemlins/spade.gif[/img]___brings-in___folds
Seat 5: xx xx T[img]/images/graemlins/spade.gif[/img]___folds
Seat 6: xx xx K[img]/images/graemlins/diamond.gif[/img]___folds
Seat 7: xx xx 7[img]/images/graemlins/club.gif[/img]___folds
Seat 8: xx xx 6[img]/images/graemlins/heart.gif[/img]___folds

4th Street - (3.90 SB)

Hero: A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]___bets
Seat 3: xx xx 7[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/diamond.gif[/img]___calls

5th Street - (2.95 BB)

Hero: A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img]___bets
Seat 3: xx xx 7[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/club.gif[/img]___checks___calls

6th Street - (4.95 BB)

Hero: A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img]___bets
Seat 3: xx xx 7[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/club.gif[/img]___checks___calls

River - (6.95 BB)

Hero: A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img]___???
Seat 3: xx xx 7[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/club.gif[/img] xx___checks