I-130 approved , dependent 485 pending , what next

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wife  I-130 approved last week. still her dependent employment based 485 pending  PD: EB2 July 2008 (I got my GC 2 years ago ). she is carrying EAD & AP. we are    unable to make decision  which  option is  safest ..

1) should wait untill EB2 PD become current(EB2 July 2008), 

2) interfile the I-130 approval with the pending employment based I-485 application

3) consular processing by submitting I-824

 

a) what if we go for option 3  consular processing,can we keep pending Employment based EB2 or wilt it be automatically cancelled or converted ?

b) what if pending Employment based EB2 PD become current in between ?

c) how long consular processing takes 

. appreciate your advise