Yes. Also talk to your attorney and confirm with him.
I have noticed that the 140 approval (concurrent or otherwise) is less than 4 months recently. You can wait for others to confirm my views but my personal opinion is not to wait a single day for filling your 140/485. I have guessed from your username that you are from one of the countries likely to be affected by the retrogression in EB2 catagory.
following is what was published on murthy.com. Have a peep on that site to find out more on the issue.
DOS FY2006 Predictions for EB1s and EB2s©MurthyDotCom
The DOS also anticipates that cut-off dates will be established for Employment Based First Preference (EB1) and EB2 cases for mainland China and India no later than December 2005. Therefore, for nationals of China and India, if a case is eligible for I-485 filing at this time, it is important to proceed, before cut-off dates are established for these countries. Eligibility after the cut-off dates are established will depend upon one's priority date.