It seems we can take the 4,500 chips in three seperate tranches if we wish, up to the end of Level 4.
In UK "Double Stack" things, I tend just to take the initial tranche, it feels safer somehow, we can't bust early, lit's almost like we have a spare bullet, & can maybe gamble a tad.
That would be my preferred route.
But, in my deep experience of these Events......someone pops it up to 100 @ 25/25, 4 callers, & suddenly we find ourselves pot stuck on the flop if we lead out & get called. So maybe take the whole $4,500.
By Level 4, the Blinds would be 75-150, so unless a double up occurred, 1,500 would be an unplayable stack by then.
http://www.wsop.com/2012/structuresheets/12147-structure.pdfGuess it also depends what everyone else at the table does.
Don't have these decisions in the Nugget $230, or the Luton Friday Night thing.