This post hit home for me - my fiancé and I graduated grad school about 2.5 years ago. We are plugging away at over $100,000 in loans, which has pushed back our wedding and children plans. We are both 28 (I'll be 29 this summer), and we are getting married in May. The (tentative) plan at this point is to start trying for kids a year after that, right before I turn 30.
Here is what we did. We graduated school, and took jobs in different states for 1.5 years. Then we both started applying for jobs near the other person and in some mutual cities. He got a job offer first near me, so moved into my rental. We ended up buying a house shortly after that, as it made more sense for us than renting. At this point we have $65,000 left in student loans. Essentially my whole paycheck goes to student loans (we are at about twice the minimum payment). We both make around $45,000. My (stretch) goal is to have all $35,000 of 6.8% loans paid off before we start trying to get pregnant, so that we have 9 months to build up our savings (we keep about $10,000 right now as we have very old furnace, AC, water heater and a car with over 270,000 miles). We also bought a house we can afford with only one paycheck, which should allow me to take the full 12 weeks FMLA, and then he can take his, so that our child will be a full 6 months prior to day care. Not sure if that plan will work (it is America, so it would be odd for him to take paternity leave, but he does work at a university in a somewhat progressive office). This also left us open to one of us being a stay at home parent - not sure we are really interested in that right now, but nice to have choices! We also may look into going to 4 day workweeks, as 3 day weekends are awesome!
You guys are obviously in a better position since you already have a job, and have been able to start stacking your loans.
Good luck with your decisions! I know when I turned 27, it's like some stupid clock started ticking and I started itching for a baby. Darn biology.