please help.

With the great news about EB2 PD, I feel myself in a bit dilemma. Here is my situation: my PD (EB2, NIW) is before 01 Jan, 2004, so I suppose to file 485 in May. However, I know for sure that I’ll change my job on July. The question is: should I file the 485, or should I wait till July? Thanks.