Hi,
My husband and I are both DF508 carriers as well. We looked into IVF w/PGD, and adoption but decided to go with IUI and donor sperm from a screened donor. I guess we view it as a partial adoption without piles of 'red tape'...or waiting to deal with, and all the control over the pregnancy. It took 4 tries, but here I sit 6 months pregnant. Our son w/cf is almost 4 and extremely excited to be a big brother. I'm estimating that it ended up costing us about $4500? Good luck with your decision.