Pushing Questions ($5 SnG)

Hand 1:

Seat 1: viceroy5 ($4,930 in chips)
Seat 3: im nogenius [,] ($1,050 in chips)
Seat 5: swattdogg ($2,870 in chips)
Seat 6: yamangold ($1,160 in chips)
Seat 7: rt2play ($3,755 in chips)
Seat 10: Grand Wazzu ($1,235 in chips)
ANTES/BLINDS
im nogenius posts blind ($150), swattdogg posts blind ($300).

PRE-FLOP
yamangold folds, rt2play folds, Grand Wazzu folds, viceroy5 bets $600, im nogenius ???

Hand 2:

Seat 1: viceroy5 ($3,330 in chips)
Seat 3: im nogenius [,] ($2,550 in chips)
Seat 5: swattdogg ($1,370 in chips)
Seat 7: rt2play ($5,015 in chips)
Seat 10: Grand Wazzu ($2,735 in chips)
ANTES/BLINDS
viceroy5 posts blind ($200), im nogenius posts blind ($400).

PRE-FLOP
swattdogg folds, rt2play folds, Grand Wazzu folds, viceroy5 calls $200, im nogenius bets $2,150 and is all-in...

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Hand 1: Should I have pushed over the min-raise and hoped for a coinflip, being as that I was so short?

Hand 2: I ran this through ICM and it said it was marginal, so was this a good push?