playing the (kind of) big stack in 6-max rebuy

[PokerPhenom]

I'm top five in a six max rebuy on ftp, but 283 players still remain with the rebuy period just ending. Places 2-15 all only have a difference of about 7k, this with the amount of players left worries me about the comfortability of my stack. Blinds are 60/120 and im sitting with about 22k. Should I play normal big stack here or do I need to open up a little more and try to gather even more chips in? Thanks.