Get married before you get approuved
Been there did that !
You can have until you case is approuved to file your wife I-485.
If you get approuved before you file your your wife I-485, you will have to use the "follow to join" process. This is a consular process
(so your wife may be stuck in her contry for a few months.
BUT in either cases YOU HAVE TO BE MARRIED BEFORE YOUR I-485 GETS APPROUVED! In the case you get married after your I-485 is approuved, your wife will need to use the "family base" immigration process this is 3-6 YEARS process, and she will probably not be able to stay in the US during her "processing".
So if you fill your 485 before you get married, consider the INS notice to get fingerprinted as you "LAST CALL". Or wait until you get married to file for both your petitions.
I\'ve been there, I know what I\'m talking about!
Roger Cadoret