If Gox enables withdrawals by Monday/Tuesday, which the markets are already anticipating (thus the price is $620 on stamp now) the price will shoot up back to $800+ range imo.
Sure alot of people will withdraw their BTC from Gox into Bitstamp or other exchanges or wallets, but that doesn't mean that everyone is going to sell all at once, also in the rally there is going to be alot of buyers. There is going to be alot of profit taking from those who took risks transferring fiat buying low but those are minority.
I think it will not change much. Maybe the stamp price will go back to 700 or 750. But I think it is unlikely, that the Gox people would sell their btc. I think many of them will store them in a save place.
But you would lose a slight chance for big profit. Imagine you make a sell order at 2000$ all the time and one day some manic buy 10 000btc at once