How aggro do you steal on the bubble?

[DesertCat]

We were down to four, and I had been very aggressive in blind stealing already to try to catch up to the leaders. I'm struggling with controlling my inner aggro, how hard should I push a medium stack on the bubble? Is K8s too weak? Any advice for reasonable hands?

***** Hand History for Game 2496018300 *****
NL Texas Hold'em $20 Buy-in + $2 Entry Fee Trny:14638323 Level:7 Blinds(150/300) - Sunday, August 07, 20:55:20 EDT 2005
Table Table 13767 (Real Money)
Seat 5 is the button
Total number of players : 4
Seat 2: lcksmith ( $935 )
Seat 5: WEBuffett ( $2000 )
Seat 7: cpratt4881 ( $2805 )
Seat 10: krister342 ( $2260 )
Trny:14638323 Level:7
Blinds(150/300)
** Dealing down cards **
Dealt to WEBuffett [ Kh 8h ]
lcksmith folds.
WEBuffett is all-In.